Install WHM Cpanel on AlmaLinux 8 Server - Step by Step Process ?

This article covers the complete steps to install WHM Cpanel on AlmaLinux 8 Server.

To manage Linux servers for hosting purposes most of the services are using WHM's Cpanel.

Although there are many hosting manager software, because of its easy-to-use interface and features, it is one of the best control panels for Web hosting services. 


cPanel, Control Panel, is a control panel developed in 1997 that offers us high-quality web hosting with excellent features that, thanks to WHM (Web Host Manager), can be managed from a graphics console, with everyone doing their job.

Unable to find the User entry – Fix Apache Web Agent Installation Error

This article covers how to fix Unable to find the User entry Apache Web Agent Installation Error.

This arror happens when we fail to set the user and group in the Apache httpd.conf file. Also, You will see "Unable to find the "User" entry in the httpd.conf file, will try APACHE_RUN_USER environment variable" and/or "Unable to find the "Group" entry in the httpd.conf file, will try APACHE_RUN_GROUP environment variable" errors.

To resolve this Apache error:
1. Check whether the user and group are set; you can do this via the httpd.conf file or equivalent file (such as envvars). For example:
a. Review the httpd.conf file and check whether the user and group are set. By default, they are set to apache, for example:

$ cat httpd.conf | grep 'User\|Group'
...
User apache
Group apache
..

If they are not set, you should set them; you can set them to apache or nobody.
b. Review the envvars file to ensure the user and group are set in the APACHE_RUN_USER and APACHE_RUN_GROUP environment variables. For example:

$ cat envvars | grep 'APACHE_RUN_USER\|APACHE_RUN_GROUP'
export APACHE_RUN_USER=apache
export APACHE_RUN_GROUP=apacheIf they are not set, you should set them; you can set them to apache or nobody.

2.     Review the passwd and group files to check whether the user and group match what is set in your httpd.conf file or equivalent. For example:

$ cat /etc/passwd | grep apache
apache:x:48:48:apache:/usr/share/httpd:/sbin/nologin
$ cat /etc/group | grep apache
apache:x:48:


If they are not set, you should set them to match what is in the httpd.conf file or equivalent.

PHP Handlers for your Server - Which is suitable

This article covers the pros and cons of different PHP Handlers. Basically, selecting the proper PHP handler plays a major role in the server's stability and performance. 

Apache does not natively support PHP scripts without a special module. The module that tells Apache how to handle PHP scripts is referred to as a PHP handler. 

Without a properly configured module, Apache will just send you the PHP file as a download since it doesn't know what else to do.


How does each PHP handler work and what are the pros and cons :

1. DSO/Apache Module

This is also referred to as mod_php. This module allows Apache itself to directly parse and display PHP files. PHP scripts parsed by mod_php run as the same user that Apache itself does (rather than the user account that hosts the PHP files.


Pros

i. One of the fastest handlers available.

ii. Works with mod_ruid2 or mpm_itk modules.


Cons

i. Only works with a single version of PHP on cPanel servers (you'll need to use other handers for other versions of PHP if you offer them).

ii. Scripts run as the Apache user rather than the owner of the domain or subdomain. For example, on a cPanel server, if the script creates a file or directory, that file will be owned by the user "nobody" which can cause problems when the account owner goes to backup or remove them.


2. CGI

Stands for Common Gateway Interface. Using this handler, the system will run PHP scripts as the user that owns the domain or subdomain.


Pros

Scripts run as the domain or subdomain user, not as the Apache user.


Cons

i. One of the slowest handers.

ii. Doesn't work well with PHP opcode caching.

iii. Cannot put PHP configuration changes in an .htaccess file.


3. FCGI/FastCGI

FastCGI is a variation of the CGI protocol that provides a number of benefits over the older CGI handler. Using this module, the system will run PHP scripts as the user that owns the domain or subdomain. There are some differences between mod_fastcgi and mod_fcgid, but none that are relevant to the scope of this article.


Pros

i. Scripts run as the domain or subdomain user, not as the Apache user.

ii. Very fast handler.

iii. Works with PHP opcode caching.


Cons

i. This handler uses more memory than most of the others.

ii. Cannot put PHP configuration changes in an .htaccess file.


4. PHP-FPM

FPM stands for FastCGI Process Manager. It is an improved way of implementing FastCGI processing of PHP.  Using this handler, the system will run PHP scripts as the user that owns the domain or subdomain. Each FPM pool can have independent settings.


Pros

i. Scripts run as the domain or subdomain user, not as the Apache user.

ii. One of the fastest PHP handlers.

iii. Works with PHP opcode caching.

iv. Allows for some additional level of flexibility per pool.


Cons

i. This handler can use more memory than any other handler listed here, but that depends on the number of sites using PHP-FPM and the configuration of the FPM pool.

ii. Can be somewhat more complicated to manage.

iii. Cannot put PHP configuration changes in an .htaccess file and some directives can only be changed on a global level.


5. suPHP

This handler was specifically designed to serve PHP scripts as the owner of the domain or subdomain that is executing the PHP script. On cPanel servers, it is also configured to disallow execution of files with unsafe permissions. cPanel their copy of suPHP with the latest security fixes.


Pros

i. Scripts run as the domain or subdomain user, not as the Apache user.

ii. cPanel configures suPHP so that it blocks accessing or executing any files or directories with permissions higher than 755 for security.


Cons

i. Slowest PHP handler in most cases.

ii. PHP Opcode caching has no performance improvement and only wastes memory.

iii. Cannot put PHP configuration changes in an .htaccess file.


6. LSAPI

This handler implements the LiteSpeed Web Server (LSWS) SAPI. This handler requires CloudLiunx or LSWS for the maximum benefits. Using this handler, the system will run PHP scripts as the user that owns the domain or subdomain.


Pros

i. Designed to perform as well or better than PHP-FPM under certain circumstance.

ii. Less memory use than most other handlers.

iii. Scripts run as the domain or subdomain user, not as the Apache user.

iv. No special configuration required.

v. Can read PHP values out of a .htaccess file.


Cons

i. You don't get full benefits without purchasing a third-party commercial product.

ii. Not compatible with mod_ruid2 or mpm_itk (but it shouldn't need them).

Install Drupal with Docker Compose

This article covers how to install Drupal with Docker Compose. Basically, installation process of Drupal can be simplified with the use of tools like Docker and Docker Compose. Docker Compose can be used to create a Drupal installation with an Nginx web server. 


Drupal and Docker needs the following to work:

1. HTTP Server with PHP: We can either use Apache with PHP or Nginx with PHP. I'm going to demonstrate building the Docker using Apache with PHP. A Drupal docker can also have services like SSH (for drush alias to work) and some important utilities like vim

2. SQL Server: Choose your favourite SQL Service (MySQL or PostGRESQL or SQLite). I'm going to be using a MySQL docker. The idea behind using a separate docker for SQL is so that you have a freedom to choose an internal SQL service or an external SQL Services like Amazon RDS without affecting your Drupal environment.


The need to Use Docker to Run Drupal:

Using the Drupal and PostgreSQL images from Docker Hub offers the following benefits:

1. The configuration of the software has been done for you, which means that you don’t need to follow a step-by-step process for each application to get them running on your system.

2. Updating your software is as simple as downloading the latest images from Docker Hub.

3. Images and containers are self-contained, which means that they are easy to clean up if you decide to remove them.


How to Set Up Drupal ?

1. Create a new directory in your home folder called my_drupal and cd into it:

mkdir ~/my_drupal/

cd ~/my_drupal/

2. Create a file named docker-compose.yml in this folder and add the following contents. Set your own password for the POSTGRES_PASSWORD option.

3. From the my_drupal directory, start your Docker containers:

docker-compose up -d

4. The Docker containers will take a minute or two to start up Drupal and PostgreSQL. Afterwards, you can visit your Linode’s IP address in your web browser .

5. On the Set up database page, select PostgreSQL as the Database type and enter the following values:

Database name: postgres

Database username: postgres

Database password: The password you set in the docker-compose.yml file

Host (under Advanced Options): postgres

6. When creating your Drupal user, be sure to enter a password that is different from your PostgreSQL password.

Configure Varnish with Apache - How to do it

This article covers how to configure Varnish #cache on the #Apache server. Varnish is an HTTP accelerator and a useful tool for speeding up a server, especially during a times when there is high traffic to a site. 

It works by redirecting visitors to static pages whenever possible and only drawing on the virtual private server itself if there is a need for an active process.

#Varnish is a caching HTTP reverse proxy. It receives requests from clients and tries to answer them from the cache.


Where is varnish configuration file?

The Varnish configuration file will be located in the /etc/varnish directory in CentOS 7. 

To make Varnish work in front of Apache, you will need to set up some basic configurations. 

By default Varnish listens on port 6081 . 

You will need to change port 6081 to 80 so that website requests access the Varnish cache first.


What is varnish WordPress?

Varnish is a full-page cache and HTTP preprocessor which can be used to speed up requests for a WordPress site. 

Setting up Varnish is a technical task, as it requires installing and configuring a system package on a web server, rather than just installing a plugin.

FreeBSD Apache Jail Connection refused connect to listener failed

This article covers how to fix 'FreeBSD Apache Jail: Connection refused' issue for our customers. 

While running Apache 2 server under FreeBSD jail, you may see a warning error messages in /var/log/httpd-error.log as follows:

[warn] (61)Connection refused: connect to listener on 0.0.0.0:80


To resolve this FreeBSD Apache Jail error:

1. You need to always set your actual, real IP. Open httpd.conf

# vi /usr/local/etc/apache22/httpd.conf

2. Find out Listen directive:

#Listen 12.34.56.78:80

Listen directive allows you to bind Apache to specific IP addresses and/or ports, instead of the default. 

Change this to Listen on specific IP addresses as shown below to prevent Apache from glomming onto all bound IP addresses i.e. 0.0.0.0 which is not available in jail

3. Save and close the file. Restart apache:

# /usr/local/etc/rc.d/apache22 restart

Limit cPanel bandwidth using mod_cband

This article covers how to limit cPanel bandwidth using mod_cband. In order to compile mod_cband, we must have apxs2 installed.
We can achieve that by doing this:
$ apt-get install apache2-prefork-dev

Next we download and install mod_cband like this:
cd /tmp
wget http://cband.linux.pl/download/mod-cband-0.9.7.4.tgz
tar xzvf mod-cband-0.9.7.4.tgz
cd mod-cband-0.9.7.4
./configure
make
make install

The make install command should have added the mod_cband module to /etc/apache2/httpd.conf. Run:
$ vi /etc/apache2/httpd.conf
and check if you find a line like this:
LoadModule cband_module       /usr/lib/apache2/modules/mod_cband.so

Finally restart Apache:
/etc/init.d/apache2 restart
The mod_cband installation is now finished.

Litespeed vs Nginx which is more efficient

This article will guide you about LiteSpeed vs Nginx on a performance basis. Basically,  LiteSpeed web server is much better in performance than the #NGINX server. 

However, it has not yet gained much popularity when compared to NGINX.

1. #LiteSpeed and Nginx use an event-driven architecture. 

2. Both are really good at serving static files, uses dramatically less memory and can handle more than four times more requests per second when compared to Apache.

3. HTTP/2 performance is a crucial metric for any modern web server. 

4. LiteSpeed takes HTTP/2 performance seriously with improvements.

MySQL error log cPanel

This article will guide you on more information about MySQL error logs and methods to resolve its errors. 

You will learn how to fix MySQL errors, crashes and other unexpected behavior from #MySQL. 

To view mysql error logs:

1. edit /etc/my.cnf [mysqld] log=/tmp/mysql.log.

2. restart the computer or the mysqld service service mysqld restart.

3. open phpmyadmin/any application that uses mysql/mysql console and run a query.

4. cat /tmp/mysql.log ( you should see the query ).

To Clear cPanel Error Log:

1. Login to your server using an #SSH client.

2. To clear the #Apache #errors, type the following and press Enter. cat /dev/null> /usr/local/apache/logs/error_log.

3. To delete PHP error_log files, type the following and press Enter. find /home -type f -name error_log -delete.

Deploy PHP application with Kubernetes on Ubuntu

This article will guide you on steps to deploy #PHP application with Kubernetes on #Ubuntu. 

Kubernetes, at its basic level, is a system for running and coordinating containerized applications across a cluster of machines. 

It is a platform designed to completely manage the life cycle of containerized applications and services using methods that provide predictability, scalability, and high availability.

#Kubernetes really shines when your #application consists of multiple services running in different containers.

Kubernetes, also referred to as K8s, is an open source system used to manage Linux Containers across private, public and hybrid cloud environments. 

In other words, Kubernetes can be used to manage microservice architectures and is deployable on most cloud providers.

Laravel error 403

This article will guide you on tips to resolve Laravel error 403 which occurs mainly due to bad permissions, improper ownerships and incorrect .htaccess file. 

The 403 Forbidden error is an #HTTP status code which means that accessing the page or resource you were trying to reach is absolutely forbidden for some reason. 

To fix #WordPress #403 #forbidden #error:

1. Create a Backup. Most of the time, you are not responsible for the errors that occur on your WordPress website hosting server.

2. Check . htaccess File.

3. Deactivate All Plugins. Login to your WordPress admin dashboard and navigate to Plugins - Installed Plugins.

Logging in Apache More about it

The Apache access logs stores information about events that occurred on your #Apache web #server. Apache web servers also provide administrators with another type of log file called error logs. 

The Apache error log has a logging level that filters the messages sent to the log. Apache #logs nothing for a single page request in warn level.

This log file is used to provide more information regarding a particular error that has occurred on the web server.

By default, you can find the Apache #access log file at the following path:

i. /var/log/apache/access. log.

ii. /var/log/apache2/access. log.

iii. /etc/httpd/logs/access_log.

To enable the Apache #HTTP access logs:

1. Open the Apache HTTP configuration at /Applications/MAMP/conf/apache/httpd.conf.

2. Find this line.

3. Change the line.

4. Restart Apache using the MAMP widgit.

5. Now, view your new logfiles!

More about Engintron cPanel

This article will guide you on how to #install #Engintron in #cPanel & fix relating #errors.  Engintron is a third-party plugin to integrate Nginx on cPanel servers. 

Engintron integrates Nginx into cPanel so you can enjoy amazing performance for your sites, without having to sacrifice important hosting features found in cPanel.

Engintron is totally free to use!

The way Engintron sets up Nginx inside your cPanel is a lot like how the popular #CloudFlare CDN works. Nginx (like CloudFlare) directly serves all static content like CSS, JS, images etc. instead of your actual web server, thus lowering the load on your cPanel server.


Engintron is the easiest way to integrate Nginx to your cPanel server:

1. Installation process is not very complicated for Engintron. 

2. Also, installation and updates are very fast, they take only a few seconds. 

3. Engintron is using the official repositories for Nginx, all Engintron software is updated whenever cPanel is updated. If something has changed on Engintron and you need to re-install it, you can install it on top of the previous installation. You don't need to uninstall it first like other Nginx installer plugins for cPanel. It works from CentOS 5 up to CentOS 7. Engintron has an app dashboard inside WHM. 

4. The interface has basic controls for Nginx, Apache, MySQL. These controls allow you to edit various configuration files. Inside the Engintron app dashboard you’ll also find some utilities to monitor things like Nginx access & error logs, check processes on your server or see incoming traffic on port 80. It doesn’t require Nginx or Apache host synchronization when adding new domains via cPanel. 

5. Also, Engintron is released under the GNU/GPL license and is 100% open source.

Configure and host an application in Apache web server on Ubuntu

This article will guide you on how to configure #Apache on #Linux. This includes #firewall configuration, managing Apache services, setting up virtual hosts, changing default listening ports, and allowing/denying specific IPs from accessing the #sites.
Apache #HTTP Server is a free and open-source web server that delivers web content through the internet. It is commonly referred to as Apache and after development, it quickly became the most popular HTTP client on the web.
The httpd. conf file is the main configuration file for the Apache web server. It's highly recommended to run Apache in standalone type for better performance and speed. ServerRoot "/etc/httpd" The option ServerRoot specifies the directory in which the configuration files of the Apache server lives.
On most systems if you installed Apache with a package manager, or it came preinstalled, the Apache configuration file is located in one of these locations:
1. /etc/apache2/httpd. conf.
2. /etc/apache2/apache2. conf.
3. /etc/httpd/httpd. conf.
4. /etc/httpd/conf/httpd. conf.

HTTP Flood DDOS Attack How to Mitigate the attack

This article will guide you on how to recover from DDoS attacks. Basically, protecting the web server against #DDoS #attacks is important. You can apply these measures to mitigate the error from causing troubles.

DNS #flood is a type of Distributed Denial of Service (DDoS) attack in which the attacker targets one or more Domain Name System (#DNS) servers belonging to a given zone, attempting to hamper resolution of resource records of that zone and its sub-zones.

To prevent DDoS attacks:

1. Buy more bandwidth. 

2. Build redundancy into your infrastructure. 

3. Configure your network hardware against DDoS attacks. 

4. Deploy anti-DDoS hardware and #software #modules. 

5. Deploy a DDoS protection appliance. 

6. Protect your DNS servers.

Directadmin Unable to write users httpd conf configuration

This article will guide you on how to fix the #error, Unable to write user's httpd.conf in Directadmin which occurs when we try to add a #domain in #DirectAdmin. 

The httpd. conf file is the main configuration file for the Apache web server. It's highly recommended to run Apache in standalone type for better performance and speed. ServerRoot "/etc/httpd" The option ServerRoot specifies the directory in which the configuration files of the Apache server lives.

Before you edit httpd.conf, you should first copy the original file to something like httpd.conf-old, for example. 

By creating a #backup, you can recover potential mistakes made while editing the new configuration file.

Ansible for launching AWS EC2 instances

This article will guide you on how to use #Ansible to launch AWS EC2 instances, security group, and RDS.

First, you're limiting the scope of the playbook to the local #hosts #group. It contains localhost and this is the way Ansible will work with #EC2 instances. Behind the scenes, Ansible connects to Python boto on the local machine and use to establish connection with the AWS #API and issue the necessary #commands.

Then we specify the name of the security group that Ansible will create for us. A security group is like a virtual firewall that must be created for your EC2 instances. If you already have one created, you can associate it with the new EC2 instance. In our case, we’ll be creating a new one from scratch.

Cloudflare error 504 gateway timeout

This article will guide you on different methods to troubleshoot and fix #Cloudflare 504 gateway timeout error.

The #504 #Gateway #Timeout #error is an #HTTP status code means that one server did not receive a timely response from another server that it was accessing while attempting to load the web page. This usually occurs when one of the two servers is down or not working properly.

To Fix 504 Gateway Timeout Errors:

1. Look for server connectivity issues.

2. Check for any #DNS changes.

3. Sift through your #logs.

4. Fix faulty #firewall configurations.

5. Comb through your website's code to find bugs.

Apache Performance Tuning via MPM Directives

This guide will help you to configure #MPM directives in the #Apache server. You can simply configure MPM #directives by logging into the server and create an optimization file and add the necessary directive change. 

Starting with Apache 2.0, Apache extended its features with a selection of Multi-Processing Modules (#MPMs), which are responsible for binding to #network ports on the machine, accepting and handling the requests. These modules determine the basis of how Apache addresses multi-processing.

To know which MPM Apache is using:

1. Enable Apache mod_info.

2. Query the mod_info url, typically curl localhost/server-info.

3. The "Server Settings" section will show "MPM Name: #Worker"

4. Run httpd -V again. It will still show prefork, not worker.

Setting up OCSP stapling on Apache

This article will guide you on how to configure OCSP stapling on the Apache server.

To Check if #OCSP #stapling is enabled:

Go to https://www.digicert.com/help and in the Server Address box, type in your server address (i.e. www.ibmimedia.com). If OCSP stapling is enabled, under #SSL Certificate has not been revoked, to the right of OCSP Staple, it says Good.

To Configure your Apache server to use OCSP Stapling:

1. Edit your site's #VirtualHost SSL configuration. 

2. Add the following line INSIDE the <VirtualHost></VirtualHost> block: SSLUseStapling on. 

3. Check the configuration for errors with the Apache Control service. Apachectl -t.

4. Reload the Apache service. service apache2 reload.

Apache Maven on Ubuntu Steps to install it

This article will guide you on how to #install #Apache #Maven on Ubuntu. Basically, Apache Maven is a popular build management tool for #Java projects. 

To test The Maven Installation in #Ubuntu:

Run the command mvn -version to check if the maven is installed properly. 

You will see the below description on the command prompt. Maven is installed successfully.

Some Maven #Commands:

1. mvn clean. This command cleans the maven project by deleting the target directory. 

2. mvn compiler:compile. This command compiles the java source classes of the maven project. 

3. mvn compiler:testCompile. 

4. mvn package. 

5. mvn install. 

6. mvn deploy. 

7. mvn validate. 

8. mvn dependency:tree.

VirtualHost cannot occur within virtualhost section in WAMP

This article will guide on steps to fix #VirtualHost cannot occur within virtualhost section in #WAMP which occurs while we try to add VirtualHost #directive and reconfigure #vhost.

Directory directive works only for filesystem objects (e.g. /var/www/mypage, C:\www\mypage), while Location directive works only for URLs (the part after your site #domain name, e.g. www.mypage.com/mylocation).

To Configure name-based virtual #hosts:

1. Install Apache webserver. Make sure you have installed #Apache webserver. 

2. Create web directory for each host. 

3. Create demo web pages for each host. 

4. Create configuration file for each host. 

5. Enable virtual host configuration files. 

6. Test Virtual hosts.

Steps To Install Spark On Ubuntu

This article will guide you on how to install #Apache spark on a single #Ubuntu system. Apache Spark is a distributed open-source, general-purpose framework used in cluster computing environments for analyzing big data. You will be able to perform basic tests before you start configuring a #Spark cluster and performing advanced actions.

Spark is not a #database so it cannot "store data". It processes #data and stores it temporarily in memory, but that's not presistent storage. It can access data that's in: #SQL Databases (Anything that can be connected using JDBC #driver).

Rewrite URLs with mod_rewrite for Apache on Ubuntu 16 04

This article will guide you on how to rewrite URLs with mod_rewrite in #Apache. Basically, mod_rewrite helps in creating human-readable URLs.

The URL #Rewrite #Module is an extension software for #IIS (Internet Information Services). URLs should be created so that they are easy to remember for the users and easy to find for the search engines. The URL Rewrite Module enables web administrators to develop and implement rules that assist them in this task.

htaccess rewrite rule includes setting a combination of rewrite condition ( #RewriteCond ) tests along with a corresponding rule ( #RewriteRule ) if the prior conditions pass. In most cases, these rules should be placed at any point after the RewriteEngine line.

SSLRandomSeed cannot occur within VirtualHost section

This article will guide you on how to fix SSLRandomSeed cannot occur within VirtualHost section which triggers when the #SSLRandomSeed directive is specified inside the #VirtualHost section. 

Deploying Kohana PHP application on Debian

This article will guide you on how to deploy Kohana on #Debian. Kohana offers powerful event handling, multiple session drivers, simple database abstraction using #SQL helpers, and libraries that transparently handle external APIs. Its generous BSD license lets developers use and modify the framework to build commercial applications.

The #AppDynamics platform provides full, code-level visibility into the performance of your PHP application built on the Kohana framework. With rapid installation and the most scalable #architecture in the industry, AppDynamics solutions help you deploy your #applications more quickly and with more confidence.

Steps to Install GoAccess on Ubuntu

This article will guide you on how to #Install GoAccess on Ubuntu which is a command-line tool and how to use it for analyzing server #logs.
With #GoAccess, you are able to #SSH into any web server you control and view or analyze relevant statistics quickly and securely. Apart from the command-line dashboard interface, it's also capable of displaying the #statistics in other formats such as HTML, JSON, and CSV, which you can use in other contexts or share with others.

Set Up Laravel Nginx and MySQL with Docker Compose

This article will guide you on how to set up #Laravel, #Nginx, and #MySQL with #Docker Compose. When using a #LEMP application stack, for example, with PHP, Nginx, MySQL and the Laravel framework, Docker can significantly streamline the setup process.
Docker Compose has further simplified the development process by allowing developers to define their #infrastructure, including application services, #networks, and volumes, in a single file. Docker Compose offers an efficient alternative to running multiple docker container create and docker container run #commands.

Steps to create a Self-Signed SSL Certificate for Apache in CentOS 8

This article will guide you on how to configure #Apache to serve encrypted requests using a self-signed SSL certificate and to redirect unencrypted HTTP requests to #HTTPS. Self-signed #certificates or certificates issued by a private CAs are not appropriate for use with the general public. It can only properly verify the identity of the server when it is signed by a trusted third party because any attacker can create a self-signed certificate and launch a man-in-the-middle attack.

SSLSessionCache cannot occur within VirtualHost section

This article will guide you on the steps to resolve #SSLSessionCache cannot occur within #VirtualHost section issue. Basically, SSLSessionCache is a file-based #cache of established #SSL sessions.

Step by step process to Secure Apache with Lets Encrypt on CentOS 8

This article will guide you on the process to secure #Apache with Let’s Encrypt by installing Let's Encrypt #Certbot client, downloading #SSL #certificates for the #domain, and setting up automatic certificate renewal.

The objective of Let's Encrypt and the #ACME protocol is to make it possible to set up an #HTTPS server and have it automatically obtain a browser-trusted certificate, without any human intervention.

304 not modified error Steps to fix it

An #HTTP 304 not modified status #code means that the website you're requesting hasn't been updated since the last time you accessed it.

Basically, your browser will save (or cache) web #pages so it doesn't have to repeatedly download the same information. This is an attempt to speed up page delivery. However, if this happens to your site, #visitors could be prevented from accessing your #web pages.

Install and Configure ModSecurity on Ubuntu

This article will guide you on the steps to perform #ModSecurity installation on #Ubuntu which involves enabling Core Rule Set to handle malicious activities.

Apache error AH02572 Failed to configure at least one certificate and key

This article will guide you on the steps to resolve #Apache #error "AH02572: Failed to configure at least one #certificate and key" which happens due to improper #SSL configuration.

Facts about Apache Thrift

Thrift can be set up to use HTTP and JSON pretty easily if you want it (say if your client is somewhere on the internet and needs to pass firewalls) Thrift supports persistent connections and avoids the continuous TCP and HTTP handshakes that HTTP incurs.

How to install PHP on Windows

This tutorial will guide you on the process to install PHP on a Windows server which allows you to build and test a web application safely without affecting the live website data.

Steps to sync two Apache web servers

This article will guide you on how to setup syncing Apache web servers which involves a number of procedures such as installation and configuration of LSyncD, setting up Apache Configuration Replication, and so on.

How to resolve apache not listening on port 443

This guide will help you to solve Apache not listening on port 443 which occurs as a result of Incorrect configuration settings, firewall restrictions and other factors.

PhpMyAdmin installation on Debian

This article will take you through the steps you need to take to install, Configure and Secure phpMyAdmin on your Debian 10 Server.

Running multiple versions of PHP on Apache PHP-FPM

This article will guide you through the steps you need to take to run multiple PHP versions on Apache PHP-FPM. We implemented this on Ubuntu 20.04 server handling two websites with two different PHP versions (PHP 7.2 and 7.3).

How to fix SSLSessionCache shmcb session cache not supported

SSLSessionCache: 'shmcb' error is usually triggered after upgrading the Apache from 2.2. to 2.4 version.

How to fix No matching DirectoryIndex Apache Error

Steps to fix  "No matching DirectoryIndex"  Apache web server error.

Solution to sslv3 alert handshake failure

Easy method to fix SSLv3 alert handshake failure.

Solution to unable to write random state openssl error

Best methods to fix "unable to write random state" OpenSSL error.

Solution to SSLPassPhraseDialog builtin is not supported on Win32 error

Easy way to fix  SSLPassPhraseDialog builtin is not supported on Win32 error in relation to Apache web server.

Solution to apache Error 408

Best method to fix Apache Error 408.

Solution to invalid command SSLEngine Error in apache

Effective method of fixing Invalid command SSLEngine Error in Apache web server.

Solve Error 505 HTTP Version Not Supported

Best method to fix Hyper Text Transfer Protocol (HTTP) error 505 Version Not Supported

Solve Apache error AH01276 Cannot serve directory

The solution to Apache server error No matching DirectoryIndex is here in this Article.


Solving Apache error client denied by server configuration

Are you facing "Apache error client denied by server configuration" web server issue? Let us solve it for you!

Resolving Apache error 1066

Solving Apache error 1066 issues by fixing errors in the web server configuration file.

Fix lighttpd 404 not found error

Lighttpd web server 404 not found error triggers when there a file permission issue or in cases where the configuration is not accurate.

Fix CodeIgniter Error 404

An #Error 404 is very common and we have seen our customers complain about it in their #CodeIgniter application website. This error means that there is a an incorrect configuration in the server files. Errors in the .htaccess file as well as the application routes.php file can cause this.

Install LibreNMS on Ubuntu 20.04 LTS using Nginx - Step by step guide ?

This article covers the process of installing LibreNMS on your Ubuntu 20.04 LTS Focal Fossa system. In fact, LibreNms works and supports protocols such as SNMP, LLDP, OSPF, ARP, CDP, BGP and FDP to auto-discover the network.  You can also use LibreNms to monitor many network hardware (such as Cisco, Juniper, Foundry, FreeBSD, Brocade) and even operating systems such as Windows, Linux, and FreeBSD.

Install Apache Ant on CentOS 8 - Step by step guide ?

This article covers the process of installing Apache Ant on your CentOS 8 system. In fact, Apache Ant is a Java library and command-line tool that help building software. Ant supplies a number of built-in tasks that allows to compile, assemble, and run Java applications. Its build files are written in XML so it is open standard, portable and easy to understand.

Install Apache Ant on Ubuntu 20.04 LTS - Step by step guide ?

This article covers the process of installing Apache Ant on your Ubuntu 20.04 LTS Focal Fossa system. In fact, Apache Ant is a software tool for automating software build processes especially on Java environments. It is a Java library and command-line tool whose mission is to drive processes described in build files as targets and extension points dependent upon each other. The main known usage of Ant is the build of Java applications.

Install Apache Subversion on Ubuntu 20.04 LTS - Step by step guide ?

This article covers the process of installing Subversion on Ubuntu 20.04 LTS Focal Fossa system. In fact, Apache Subversion, often abbreviated to SVN, is a version control system, distributed as open-source software.

Install Nextcloud with Nginx on Ubuntu 20.04 LTS - Step by step guide ?

This article covers the process of installing  and configuring Nextcloud personal cloud storage on your Ubuntu 20.04 LTS Focal Fossa system. In fact, Nextcloud is a free (Open Source) Dropbox-like software, a fork of the ownCloud project. Nextcloud is written in PHP and JavaScript, it supports many database systems such as MySQL/MariaDB, PostgreSQL, Oracle Database, and SQLite.

In order to keep your files synchronized between Desktop and your own server, Nextcloud provides applications for Windows, Linux, and Mac desktops and a mobile app for Android and iOS. Nextcloud is not just a Dropbox clone, it provides additional features like Calendar, Contacts, Schedule tasks, and streaming media with Ampache etc.

Install an SSL Certificate in Tomcat for a Java project in Linux

This article covers how to generate CSR files and install CA signed SSL certificates in Tomcat for Java projects.


The need to create a self-signed certificate ?

  • It allows you to learn to create a keystore and certificate, which is good practice for getting an actual SSL/TLS certificate provided by a Certificate Authority.
  • It allows you to use a certificate right away and make sure it works successfully.
  • It's free.

Install and Configure Apache Spark on Ubuntu 20.04

This article covers how to install and configure apache spark on ubuntu. In fact, Apache Spark is a framework used in cluster computing environments for analyzing big data. This platform became widely popular due to its ease of use and the improved data processing speeds over Hadoop. Spark basically supports various APIs for streaming, graph processing, SQL, MLLib. It also supports Java, Python, Scala, and R as the preferred languages. Spark is mostly installed in Hadoop clusters but you can also install and configure spark in standalone mode.

Encrypt Apache Webserver with Let's Encrypt SSL Certificate on Rocky Linux 8 - How to do it ?

This article covers how to secure your Apache webserver with Let's Encrypt SSL certificate. In fact, Let's Encrypt SSL certificates are yet another option for securing your web site with an SSL. Once installed, the system provides automatic renewal of certificates and will encrypt traffic to your web site.

Install Apache Maven on Rocky Linux / CentOS 8 - Follow the steps here ?

This article covers how to install Apache Maven on Rocky Linux. You can now visit the Apache Maven Documentation page to learn how you can get started with managing Java projects with Apache Maven. In fact, Apache Maven Maven is a build automation tool used primarily for Java-based projects, but can also be used to build and manage projects written in C#, Ruby, Scala, and other languages.

Top 10 Open-Source Application Performance Monitoring (APM) Software for Better Visibility

This article covers what APM software is all about, its benefits, and the top open-source APM software to help you monitor, troubleshoot, and optimize your apps. In fact, OpenAPM shows you which open source Application Performance Management tools are suitable for your stack. We discussed the best open-source APM tools such as Apache Skywalking, Signoz, Pinpoint, Stagemonitor, Metrics, Scouter, Hypertrace, and AppPerf. 

APM software plays a significant role in making sure the app performance is solid and meets user expectations. It can identify issues and notify you so you can make quick fixes and improve its performance.


Importance of Application Performance Monitoring tools:

  • Speed up your development lifecycle.
  • Perform code audits.
  • Gain an understanding of which features are really being used by your customers.
  • Understand application dependencies.
  • Uncover performance problems.
  • Increase your confidence in the software you release.
  • Monitor the impact of your code changes.
  • User experience monitoring. Sometimes this is known as Real User Monitoring (RUM).
  • Network Monitoring and Network Performance.

Install LAMP Stack on CentOS 8 - Step by Step Process ?

This article covers how to install the LAMP stack on the CentOS system. If are using another Linux distribution, visit how to install LAMP stack on Debian, Ubuntu, Red Hat, and Rocky Linux. Basically, A LAMP stack is a collection of open-source software that you can use as a platform to create websites and web applications. The term LAMP is an acronym standing for Linux operating system, the Apache HTTP Server, the MySQL database system, and the PHP programming language.


In LAMP:

  • Linux serves as the server's operating system that handles all the commands on the machine.
  • Apache is a web server software that manages HTTP requests to deliver your website's content.
  • MySQL is a relational database management system (RDBMS) whose function is to maintain user's data on a server.
  • PHP is a scripting language for server-side communication.

Install PHP 8.0 on Rocky Linux 8 - Best Procedure ?

This article covers steps to install PHP 8.0 in Rocky Linux. PHP is used to develop static or dynamic websites or web applications. Many popular CMS such as WordPress, Magento, and Joomla is written in PHP. Frameworks such as Laravel, Symfony, and CodeIgniter is also using PHP.

To list the available PHP version on your Linux terminal, run the command:

$ sudo dnf module list php

To verify PHP version, simply run the command:

$ php -v 

To install PHP packages and dependencies, run the command:

$ sudo apt install php php-cli php-fpm php-json php-common php-mysql php-zip php-gd php-mbstring php-curl php-xml php-pear php-bcmath


How to Install PHP 7.4 on Ubuntu ?

Installing PHP 7.4 on Ubuntu 19.04/18.04 is a bit different than 20.04. 1. To get started, update apt and add the required repositories:

$ sudo apt-get update
$ sudo apt -y install software-properties-common
$ sudo add-apt-repository ppa:ondrej/php
$ sudo apt-get update

2. And begin the install.

$ sudo apt install php7.4

3. After the install is complete, you can check the version that is installed and in use.

$ php -v

Install LAMP Stack on Rocky Linux 8 - Step by Step Process ?

This article covers how to install LAMP stack on Rocky Linux 8.4. You can now proceed to test or host your website and applications. A LAMP stack is a group of open-source software that is typically installed together to enable a server to host dynamic websites and web apps. This term is actually an acronym which represents the Linux operating system, with the Apache web server. The site data is stored in a MySQL database, and dynamic content is processed by PHP.


How to Install  and configure Apache Web Server ?

1. First, we will start by installing the Apache web server. To complete the installation, use the following command:

$ yum install httpd httpd-tools

2. Once the installation is complete, enable Apache (to start automatically upon system boot), start the web server and verify the status using the commands below:

$ systemctl enable httpd
$ systemctl start httpd
$ systemctl status httpd

3. To make your pages available to public, you will have to edit your firewall rules to allow HTTP and HTTPS requests on your web server by using the following commands:

$ firewall-cmd --permanent --zone=public --add-service=http 
$ firewall-cmd --permanent --zone=public --add-service=https 
$ firewall-cmd --reload
4. Verify that the web server is running and accessible by accessing your server’s IP address:
$ echo "Hello there, Apache webserver is now running" > /var/www/html/index.html

5. And restart tht Web Server to reflect the changes made:

$ systemctl restart httpd

From your browser,

http://IP_address


How to Install PHP on CentOS ?

1. To install PHP on your RHEL 8 use the command below:

$ yum install -y php-mysqlnd php-dom php-simplexml php-xml php-xmlreader php-curl php-exif php-ftp php-gd php-iconv  php-json php-mbstring php-posix php-sockets php-tokenizer

2. Now restart your web server so that Apache knows that it will be serving PHP requests as well:

$ systemctl restart httpd

Install Apache Maven on CentOS 8 - Easy Method ?

This article covers the installation methods( Yum package manager or via direct download method), you can easily install Apache Maven on CentOS. Apache Maven is basically a software project management and comprehension tool. 


How to check Apache Maven on Linux?

Use the following command to check the version of installed Maven on your system:

$ mvn -version

Install LAMP Stack on CentOS 7 - Step by Step Process ?

This article covers how to install LAMP stack on CentOS 7. LAMP is a stack of applications that work together on a web server to host a website. With that being said, each individual program serves a different purpose.

In LAMP: 

  • Linux serves as the server's operating system that handles all the commands on the machine.
  • Apache is a web server software that manages HTTP requests to deliver your website's content.
  • MySQL is a relational database management system (RDBMS) whose function is to maintain user's data on a server.
  • PHP is a scripting language for server-side communication.


To install Apache easily using CentOS's package manager, yum:

1. Run the command.

$ sudo yum install httpd

2. Once it installs, you can start Apache on your server.

$ sudo systemctl start httpd.service

3. You can do a spot check right away to verify that everything went as planned by visiting your server's public IP address in your web browser.

http://your_server_IP_address/


Important PHP Modules:

  • php-bcmath.x86_64 : A module for PHP applications for using the bcmath library.
  • php-cli.x86_64 : Command-line interface for PHP.
  • php-common.x86_64 : Common files for PHP.
  • php-dba.x86_64 : A database abstraction layer module for PHP applications.
  • php-devel.x86_64 : Files needed for building PHP extensions.
  • php-embedded.x86_64 : PHP library for embedding in applications.
  • php-enchant.x86_64 : Enchant spelling extension for PHP applications.
  • php-fpm.x86_64 : PHP FastCGI Process Manager.
  • php-gd.x86_64 : A module for PHP applications for using the gd graphics library.

Install Apache Cassandra on Ubuntu 20.04 - Step by Step Process ?

This article covers how to install Apache Cassandra on Ubuntu 20.04 LTS. Apache Cassandra is an open-source non-relational database that delivers high performance, linear scalability, and continuous availability. All these features make Cassandra an ideal platform for mission-critical data.

To learn more about Apache Cassandra, visit its official documentation site.


How to install Java on Ubuntu ?

1. To check whether Java is installed, run the command:

$ java -version

2. To install OpenJDK, execute the following apt command:

$ sudo apt install openjdk-8-jdk

3. Once again, confirm that Java is installed by running the command:

$ java -version


How to Install Apache Cassandra in Ubuntu ?

1. First, install the apt-transport-https package to allow access of repositories via the https protocol:

$ sudo apt install apt-transport-https

2. Next, Import the GPG key using following wget command as shown:

$ wget -q -O - https://www.apache.org/dist/cassandra/KEYS | sudo apt-key add -

3. Then add Apache Cassandra's repository to the system’s sources list file as shown:

$ sudo sh -c 'echo "deb http://www.apache.org/dist/cassandra/debian 311x main" > /etc/apt/sources.list.d/cassandra.list'

4. Before installing Apache Cassandra, you need to update the package list first:

$ sudo apt update

5. Then install the NoSQL database using the command:

$ sudo apt install cassandra

6. Usually, Apache Cassandra starts automatically. To confirm its status, run the following command:

$ sudo systemctl status cassandra

7. Additionally, you can verify the stats of your node by running the command:

$ sudo nodetool status

Install PHP 7.3 on Ubuntu 18.04 - Step by Step Process ?

This article covers how to install PHP 7.3 on Ubuntu 18.04 server. Also, you will learn how to configure PHP with Apache and Nginx web servers. 


How to Install PHP 7.4 on Ubuntu ?

Use the following set of commands to enable PPA for PHP 7.4 in your Ubuntu system and install it. You can use this version for production use also.

$ sudo apt-get install software-properties-common
$ sudo add-apt-repository ppa:ondrej/php
$ sudo apt-get update
$ sudo apt-get install -y php7.4

Now use the following command to check installed php version on your system.

$ php -v 


How to Install PHP 7 Modules ?

You can install the required PHP modules on your system as below command:

$ sudo apt-get install php7.2-mysql php7.2-curl php7.2-json php7.2-cgi php7.2-xsl

Install phpMyAdmin with Apache on CentOS 7 - Step by Step Process ?

This article covers how to Install phpMyAdmin with Apache on CentOS 7 system. phpMyAdmin is a database utility used for managing MySQL databases through a graphical web-based interface. It can be configured to manage a local database (on the same system), or a remote database (over a network).


To Install EPEL Repository:

1. Get access to the EPEL repository – the Extra Packages for Enterprise Linux, by running the command.

$ sudo yum install -y epel-release

2. Once that operation finishes, it's a good idea to refresh and update the EPEL repository.

$ sudo yum –y update


To Install Apache Web Server:

1. Install Apache on CentOS use the command.

$ yum install httpd -y

2. Verify the status of Apache by running with the command.

$ systemctl status httpd


To install PHPMyAdmin on CentOS, enter the command:

$ sudo yum -y install phpmyadmin

Install phpMyAdmin with Apache on Ubuntu 18.04 - Step by Step Process ?

This article covers how to install phpMyAdmin with Apache on Ubuntu 18.04 system. While many users need the functionality of a database management system like MySQL, they may not feel comfortable interacting with the system solely from the MySQL prompt. phpMyAdmin was created so that users can interact with MySQL through a web interface. 


Important php packages includes:

  • php-mbstring: A module for managing non-ASCII strings and convert strings to different encodings.
  • php-zip: This extension supports uploading .zip files to phpMyAdmin.
  • php-gd: Enables support for the GD Graphics Library.
  • php-json: Provides PHP with support for JSON serialization.
  • php-curl: Allows PHP to interact with different kinds of servers using different protocols.

Secure Apache with Let's Encrypt on Ubuntu 18.04 - How to do about it ?

This article covers how to install Let’s Encrypt SSL on Ubuntu 18.04 by using Certbot. Enabling an encrypted connection to the web server is fundamental because it allows you to use the secure HTTPS protocol for your website. Let's Encrypt, a Certification Authority issues a free certificate completely in line with the required security standards. Let's Encrypt simplifies the process for installing the security certificate to help even the less experienced user secure a website through the use of the Certbot client.


To Install Certbot client on Ubuntu:

1. First, add the Certbot repository:

$ sudo add-apt-repository ppa:certbot/certbot

You'll need to press ENTER to accept.

2. Install Certbot's Apache package with apt:

$ sudo apt install python-certbot-apache

Configure Apache Virtual Hosts on Ubuntu 18.04 - Step by Step Process ?

This article covers how to create apache virtual host files to host multiple domains on a single Ubuntu server. Each website published on the Internet is hosted on a web server (host), connected to the network with a public IP address and able to manage requests for web pages on a browser (client) such as Chrome, Firefox or Internet Explorer.

If you need to host a website on your machine, first, install a web server. Among those available, one of the best known is Apache, an open source software compatible with both Unix and Windows systems. 


How to Install Apache on Ubuntu ?

1. To install Apache 2 through the official Ubuntu repositories, proceed by typing:

$ sudo apt-get update
$ sudo apt install apache2

Since Apache communicates externally, it should be inserted among the exceptions of your Firewall. 

2. In case of using UFW, allow bidirectional communications between Apache and a Client by typing:

$ sudo ufw allow 'Apache Full'

3. Apache should already be running. To check its stateuse the command:

$ sudo systemctl status apache2

Install phpMyAdmin with Apache on Debian 9 - Step by Step Process ?

This article covers step by step process to Install and Configure phpMyAdmin with Apache on Debian 9 system. The phpMyAdmin utility is a graphical database management tool. By installing phpMyAdmin, you no longer need to use a default command-line interface to manage your databases.


To install wget:

1. Access your terminal window, and update your software package lists using the following command:

$ sudo apt update

2. The wget utility allows you to download files directly from the terminal window. Enter the following command to install the wget tool:

$ sudo apt install wget -y


To install Apache on Debian:

1. Open a terminal window, and install Apache by entering the following command:

$ sudo apt install apache2 -y

2. Enter the following command to make sure the Apache service is running:

$ systemctl status apache2

In the output, you should see a green status that says active (running).


To Install PHP on Debian 10:

1. Install core PHP packages and Apache and MySQL plugins with the following command:

$ sudo apt install php php-cgi php-mysqli php-pear php-mbstring php-gettext libapache2-mod-php php-common php-phpseclib php-mysql -y

2. Once the installation process is complete, verify that PHP has been installed:

$ php --version

The system displays the current version of PHP, along with the date of the release.

Secure Apache with Let's Encrypt on CentOS 7 - Step by Step Process ?

This article covers how to secure Apache with Let's Encrypt SSL on CentOS 7 using Certbot client. Also, you will learn how to set up a cronjob for automatic certificate renewal. Basically, A security certificate is critical for securing traffic sent from web browsers to web servers. Let's Encrypt certificate is a free, open and automated certificate authority that you can use to encrypt your site. The certificate expires after every 90 days and auto-renews at absolutely no cost.


To Install Certbot in CentOS 8.

Certbot is a client that automates the installation of the security certificate. It fetches the certificate from Let's encrypt authority and deploys it on your web server without much of a hassle.

1. Before downloading certbot, first, install packages that are necessary for the configuration of an encrypted connection:

$ sudo dnf install mod_ssl openssl

2. Download certbot using the curl command:

$ sudo curl -O https://dl.eff.org/certbot-auto

3. Next, move the certbot file to the /usr/local/bin directory and assign the execute file permissions:

$ sudo mv certbot-auto /usr/local/bin
$ sudo chmod 755 /usr/local/bin/certbot-auto


To Assign the permissions to the Document root of a domain:

$ sudo chown -R apache:apache /var/www/domain.com

For the changes to come into effect, restart the Apache service:

$ sudo systemctl restart httpd

Install Apache on Ubuntu 18.04 - Step by Step Process ?

This article covers how to successfully install Apache on your Ubuntu 18.04 server. The Apache HTTP server is the most widely-used web server in the world. It provides many powerful features, including dynamically loadable modules, robust media support, and extensive integration with other popular software.


To install Apache on Ubuntu:

1. Update your local package index:

$ sudo apt update

2. Install the apache2 package:

$ sudo apt install apache2

Configure Apache Virtual Hosts on CentOS 7

This article covers method to easily configure Apache virtual hosts. You repeat same procedure for multiple domain.

You can use yum to install Apache through CentOS's default software repositories:

$ sudo yum -y install httpd

Next, enable Apache as a CentOS service so that it will automatically start after a reboot:

$ sudo systemctl enable httpd.service


How to Set Up Local Hosts File ?

If you are on a Mac or Linux computer, edit your local hosts file with administrative privileges by typing:

$ sudo nano /etc/hosts

The details that you need to add are the public IP address of your VPS followed by the domain that you want to use to reach that VPS:

127.0.0.1   localhost
127.0.1.1   guest-desktop
server_ip_address example.com
server_ip_address example2.com

This will direct any requests for example.com and example2.com on our local computer and send them to our server at server_ip_address.

Install PHP 7.4, 7.3, 7.2, 7.1 on CentOS 7 & CentOS 8 - Step by Step Process ?

This article covers how to install specific version of PHP 7 on CentOS 7 Linux server. PHP is a programming language often used to automate server tasks. It is part of the LAMP (Linux, Apache, MySQL, PHP) stack, which is a bundle of software used for running internet servers and services. PHP handles dynamic content, database requests, and processing and displaying data.


To Verify PHP Version:

You can Check which version of PHP you are running with the command:

$ php –v


To Install PHP with Apache on CentOS:

1. Start by installing the yum-utils package by entering the following command in a terminal window:

$ sudo yum install yum-utils –y

2. Then, enable the epel-release repository by entering the following:

$ sudo yum install epel-release –y

3. Finally, add the following software repositories that contain the PHP packages:

$ sudo yum install http://rpms.remirepo.net/enterprise/remi-release-7.rpm

4. For PHP 7.3, you can enable PHP 7.3. Install the release with the following commands:

$ sudo yum-config-manager ––enable remi–php73
$ sudo yum install php php-common php-opcache php-mcrypt php-cli php-gd php-curl php-mysql –y

Install Apache on CentOS 7 Server - Step by Step Process ?

This article covers how to install Apache on your CentOS 7 system. You can now ready to start deploying your applications and use Apache as a web server.

Basically, The Apache HTTP server is the most widely-used web server in the world. It provides many powerful features including dynamically loadable modules, robust media support, and extensive integration with other popular software.


To Install Apache on CentOS:

1. Update the local Apache httpd package index to reflect the latest upstream changes:

$ sudo yum update httpd

2. Once the packages are updated, install the Apache package:

$ sudo yum install httpd

3. Enable firewalld's http service with the following command:

$ sudo firewall-cmd --permanent --add-service=http

4. Configure Apache to serve content over HTTPS, you will also want to open up port 443 by enabling the https service:

$ sudo firewall-cmd --permanent --add-service=https

5. Finally, reload the firewall to put these new rules into effect:

$ sudo firewall-cmd --reload

Configure Apache Virtual Hosts on Debian 9 - Step by Step Process ?

This article covers how to Configure up Apache Virtual Hosts on a Debian 10 server. Using Apache Virtual Hosts you can host multiple domains on a single server. 

Apache will break its functionality and components into individual units so you can customize independently. The basic unit that describes an individual site or domain is called a virtual host.


How to configure Apache Virtual Hosts on Debian ?

Apache is a free and open source web server used web server in the world, and it is commonly used in Linux servers.

To install Apache:

1. Check whether apache is already installed and running on your server. You can do this with the following command:

$ dpkg -l apache2

2. If apache is not installed, you can do this by running the following commands. First, make sure that the system repositories are up to date:

$ apt-get update

3. To install the Apache web server, execute the following:

$ apt-get install apache2

4. After the installation is complete, you should enable Apache to start automatically upon server reboot with:

$ systemctl enable apache2

5. You can also check the status of your Apache service with the following command:

$ systemctl status apache2

If you want to secure your website with an SSL certificate, you can generate and Install a free Letsencrypt SSL certificate.

Secure Apache with Let's Encrypt on Debian 9 - Step by Step Process ?

This article covers how to use certbot client of Let’s Encrypt to obtain SSL certificate for you domain.

To set these up DNS records for your server, you can follow these instructions for adding domains and then these instructions for creating DNS records:

  • An A record with your_domain pointing to your server’s public IP address.
  • An A record with www.your_domain pointing to your server’s public IP address.


To install Certbot as a snap on Debian

You must first have snapd installed on your server. 

snapd is a daemon required to install, use, and manage snaps. 

Installing the snapd package will also install the snap command on your server.

1. To install snapd, update your local package index if you've not done so recently:

$ sudo apt update

2. Then install the snapd package:

$ sudo apt install snapd

After running this command, you'll be prompted to confirm that you want to install snapd and its dependencies.

Do so by pressing Y and then ENTER.

3. Next, use the snap command to install the core snap. This will install some dependencies on your server that are needed for any snap you install, including the Certbot snap:

$ sudo snap install core

4. Then refresh the core snap. Doing so will ensure that you have the latest versions of snapd and its dependencies installed:

$ sudo snap refresh core

Following that, you can install the certbot snap with the following command.

5. Because Certbot must be allowed to edit certain configuration files in order to correctly set up certificates, this command includes the --classic option. This confinement level allows any snaps installed under it the same access to system resources as traditional packages:

$ sudo snap install --classic certbot

6. Create a symbolic link to this file in the /usr/bin/ directory to ensure that you can run the certbot command anywhere on your system:

$ sudo ln -s /snap/bin/certbot /usr/bin/certbot

Install Apache on Debian 9 Server - Step by Step Process ?

This article covers how to install an Apache web server on your Debian 9 server. The Apache HTTP server is the most widely-used web server in the world. It provides many powerful features including dynamically loadable modules, robust media support, and extensive integration with other popular software.


How to Install Apache ?

1. Let's begin by updating the local package index to reflect the latest upstream changes:

$ sudo apt update

2. Then, install the apache2 package:

$ sudo apt install apache2

 After confirming the installation, apt will install Apache and all required dependencies.


The Apache profiles begin with WWW:

1. WWW: This profile opens only port 80 (normal, unencrypted web traffic).

2. WWW Cache: This profile opens only port 8080 (sometimes used for caching and web proxies).

3. WWW Full: This profile opens both port 80 (normal, unencrypted web traffic) and port 443 (TLS/SSL encrypted traffic).

4. WWW Secure: This profile opens only port 443 (TLS/SSL encrypted traffic).


How to Manage Apache Process ?

To stop your web server, type:

$ sudo systemctl stop apache2

To start the web server when it is stopped, type:

$ sudo systemctl start apache2

To stop and then start the service again, type:

$ sudo systemctl restart apache2

If you are simply making configuration changes, Apache can often reload without dropping connections. To do this, use this command:

$ sudo systemctl reload apache2

By default, Apache is configured to start automatically when the server boots. If this is not what you want, disable this behavior by typing:

$ sudo systemctl disable apache2

To re-enable the service to start up at boot, type:

$ sudo systemctl enable apache2

Apache should now start automatically when the server boots again.

Install LAMP Stack on Debian 9 - Step by Step Process ?

This article covers how to install LAMP on Debian server along with PHPMyAdmin to manage your database. LAMP stands for Linux OS, with Apache web server, Data store in a MySql or MariaDB database, and dynamic content is processed by PHP.


To install Apache on Debian:

1. Run the following command:

$ apt-get install apache2

2. To restart your web server by typing the following command:

$ service apache2 restart

Install LAMP Stack on Ubuntu 18.04 - Step by Step Process ?

This article covers step by step process to install a LAMP stack on an Ubuntu 18.04 server. LAMP stack is a group of open-source software that is typically installed together to host dynamic websites. LAMP stands for Linux OS, with Apache web server, Data store in a MySQL database, and dynamic content is processed by PHP.


To Install Apache and Update the Firewall.

1. Install Apache using Ubuntu’s package manager, apt:

$ sudo apt update
$ sudo apt install apache2

2. Allow incoming HTTP and HTTPS traffic for this profile:

$ sudo ufw allow in "Apache Full"

Install PHP On Ubuntu 18.04 | 16.04 - Step by Step Process ?

This article covers steps To Install Linux, Apache, MySQL, PHP (LAMP) stack on Ubuntu Linux System. PHP stands for Hypertext Preprocessor, and it’s a script-based server-side programming language. PHP is often used to automate server tasks. It handles tasks like dynamic content, database requests, and processing and displaying data.

A "LAMP" stack is a group of open source software that is typically installed together to enable a server to host dynamic websites and web apps. 

This term is actually an acronym which represents the Linux operating system, with the Apache web server. 

The site data is stored in a MySQL database, and dynamic content is processed by PHP.


To Install PHP 7.2 with Apache on Ubuntu:

1. Ensure you are using the latest Ubuntu updates by entering the following command into a terminal window:

$ apt-get update && apt-get upgrade

2. To install PHP 7.2, enter the following command:

$ sudo apt-get install php libapache2-mod-php

Confirm the installation by hitting Enter. The system will download and install PHP from the software repositories. This command also installs dependencies and modules for use with Apache.

3. Verify PHP was installed, with the command:

$ php -v

Install and Configure Apache On Ubuntu 18.04 | 16.04 - Step by Step Process.

This article covers how to install an Apache web server on your Ubuntu 20.04 server.

Apache or Apache HTTP server is a free and open source web server, developed and maintained by the Apache Software Foundation.

Apache allows website developers to serve their content over the web. It serves as a delivery man by delivering files requested by users when they enter a domain name in their browser's address bar.


To Install Apache 2 on Ubuntu Linux:

1. You can download the latest version of a software by first updating the local package index of Ubuntu repositories. Open the Terminal and enter the following command in order to do so:

$ sudo apt update

2. Next, enter the following command as sudo in order to install Apache2 and its required dependencies:

$ sudo apt install apache2

You may be prompted with a y/n option to continue installation. Please enter Y, after which the installation procedure will begin.

3. When the installation is complete, you can check the version number and thus verify that Apache2 is indeed installed on your system by entering the following command:

$ apache2 -version


Apache Server Logs Location:

1. /var/log/apache2/access.log: By default, every request to your web server is recorded in this log file unless Apache is configured to do otherwise.

2. /var/log/apache2/error.log: By default, all errors are recorded in this file.

The LogLevel directive in the Apache configuration specifies how much detail the error logs will contain.

Use Let's Encrypt To Secure Apache2 On Ubuntu - How to do it ?

This article covers method to Secure Apache with Let's Encrypt on Ubuntu 20.04. Let's Encrypt is a certificate authority created by the Internet Security Research Group (ISRG).

It provides free SSL certificates via a fully automated process designed to eliminate manual certificate creation, validation, installation, and renewal.

Certificates issued by Let's Encrypt are valid for 90 days from the issue date and trusted by all major browsers today.


To install Certbot on Ubuntu:

Certbot is a command-line tool that automates the tasks for obtaining and renewing Let’s Encrypt SSL certificates. 

The certbot package is included in the default Ubuntu repositories. 

Update the packages list and install certbot using the following commands:

$ sudo apt update
$ sudo apt install certbot

Before enabling the configuration files, make sure both mod_ssl and mod_headers are enabled by issuing:

$ sudo a2enmod ssl
$ sudo a2enmod headers

Next, enable the SSL configuration files by running the following commands:

$ sudo a2enconf letsencrypt
$ sudo a2enconf ssl-params

Enable the HTTP/2 module, which will make your sites faster and more robust:

$ sudo a2enmod http2

Reload the Apache configuration for changes to take effect:

$ sudo systemctl reload apache2

Install Drupal on Debian 10 - Step by Step Process ?

This article covers how to setup Drupal on Debian Linux System.

Drupal is a powerful CMS that allows you to design stunning websites and blogs with simple tools and drag and drop features in a matter of a few hours.
It offers flexibility in terms of customization of your site to meet your desired results.
You can easily get started with free templates before advancing to premium templates that have more features.

To Configure Apache 2.4:
1. Enable Apache's rewrite module. This module is necessary since Drupal 8 enables Clean URLs by default;

$ sudo a2enmod rewrite

2. Specify the rewrite conditions for your Drupal site’s document root in Apache's configuration file using the text editor of your choice.
If you installed and configured your Apache server using LAMP stack on Debian 10 guide, the configuration file for your site is located at /etc/apache2/sites-available/example.com.conf.
File: /etc/apache2/sites-available/example.com.conf:

<Directory /var/www/html/example.com/public_html>
        Options Indexes FollowSymLinks
        AllowOverride All
        Require all granted
          RewriteEngine on
          RewriteBase /
          RewriteCond %{REQUEST_FILENAME} !-f
          RewriteCond %{REQUEST_FILENAME} !-d
          RewriteRule ^(.*)$ index.php?q=$1 [L,QSA]
</Directory>

3. Change the ownership of your site's document root from root to www-data. This allows you to install modules and themes, and to update Drupal, without being prompted for FTP credentials.

$ sudo chown -R www-data:www-data /var/www/html/example.com

4. Restart Apache so all changes are applied.

$ sudo systemctl restart apache2

Install Zabbix Agent on Ubuntu 20.04 - Step by Step Process ?

This article covers how to install the Zabbix Agent on a Ubuntu 20.04 system very conveniently.
You can ensure the successful installation of the Zabbix Agent by checking its Active status on your system. However, you can also uninstall it anytime you want.
Zabbix agent is installed on the remote host (target) to monitor the hard drive, memory processor, etc. The agent collects data and sends back to Zabbix Server.
Zabbix agents can use passive or active checks to pass information.
In passive check, Zabbix server (poller) requests an agent for certain information, and the agent sends back a value.
In the active check, the agent process all data and pushes it to the Zabbix server.
However, agent periodically connects the server to collect metric which needs to be monitored.


To Configure Zabbix agent:
Make necessary changes on the Zabbix Agent configuration file "/etc/zabbix/zabbix_agentd.conf".
After making changes, Save the changes and exit the file.
Then restart Zabbix agent service to the changes to be effected.

$ sudo systemctl restart zabbix-agent


To Configure the firewall on Zabbix agent:
1. If you have UFW firewall enables, execute the commands:

$ sudo ufw allow 10050/tcp

2. Then reload the firewall

$ sudo ufw reload

3. And verify that the port has been opened or allowed on the firewall.

$ sudo ufw status

Install Apache Solr on Ubuntu 20.04 - Step by Step Process ?

This article covers method to install Apache Solr on a Ubuntu 20.04 system. Once this search platform is installed on your Ubuntu 20.04 system, it will facilitate you with its exceptional search features.

To Access Apache Solr on Ubuntu:
You can access the Apache Solr web interface using the URL http://your-server-ip:8983/solr.
You should see the Apache Solr web interface.

To install Apache Solr 8.6 on Ubuntu 20.04:
1. You can update your system with the following command:

$ apt-get update -y
$ apt-get upgrade -y

2. Java must be installed in your system. If not installed you can install it by running the following command:

$ apt-get install default-jdk -y

3. After installing Java, you can verify the Java installation using the following command:

$ java -version

4. To get the latest version of Apache Solr is 8.6.0, You can download it with the following command:

$ wget https://archive.apache.org/dist/lucene/solr/8.6.0/solr-8.6.0.tgz

Once downloaded, extract the downloaded file with the following command:

$ tar xzf solr-8.6.0.tgz

5. Next, install the Apache Solr by executing the Solr installation script:

$ bash solr-8.6.0/bin/install_solr_service.sh solr-8.6.0.tgz

6. Apache Solr is installed and listening on port 8983.

You can verify it with the following command:

$ netstat -tunelp | grep 8983

Install phpMyAdmin with Apache on Ubuntu 20.04 - Step by Step Process ?

This article covers how you can  seamlessly install phpMyAdmin on your Ubuntu Linux system.

Working with a database can sometimes be intimidating, but PhpMyAdmin can simplify tasks by providing a control panel to view or edit your MySQL or MariaDB database.

To Install phpMyAdmin on Ubuntu:
1. Update the apt package tool to ensure we are working with the latest and greatest.

$ apt update && upgrade

2. Install PhpMyAdmin and PHP extensions for managing non-ASCII string and necessary tools.

$ apt install phpmyadmin php-mbstring php-gettext

During this installation you’ll be asked for the web server selection, we will select Apache2 and select ENTER.
Here, you have the option for automatic setup or to create the database manually.
For us, we will do the automatic installation by pressing ENTER for yes.
3. At this setup, you'll be asked to set the PhpMyAdmin password.
Specifically for the PhpMyAdmin user, phpmyadmin,  you'll want to save this in a secure spot for later retrieval.
4. Enable PHP extension.

phpenmod mbstring

5. Restart the Apache service to recognize the changes made to the system.

# systemctl restart apache2

Install CouchDB on CentOS 8 - Step by Step Process ?

This article covers CouchDB installation on CentOS Linux System. 

Apache CouchDB is an open-source database management system, developed by Apache Software Foundation. It is a NoSQL document-store database developed in ErLang.

CouchDB uses multiple formats and protocols to store, transfer, and process its data, it uses JSON (JavaScript Object Notation) to store data, JavaScript as its query language using MapReduce, and HTTP for an API.

Unlike a relational database, a CouchDB database does not store data and relationships in tables. Instead, each database is a collection of independent documents. Each document maintains its own data and self-contained schema.

CouchDB software includes a native web interface i.e. Fauxton for administration of CouchDB database server.


To Install CouchDB Yum Repository on CentOS 8:

1. Create a repo file by using vim editor.

# vi /etc/yum.repos.d/bintray-apache-couchdb-rpm.repo

2. And add following directives in this file.

[bintray--apache-couchdb-rpm]
name=bintray--apache-couchdb-rpm
baseurl=http://apache.bintray.com/couchdb-rpm/el$releasever/$basearch/
gpgcheck=0
repo_gpgcheck=0
enabled=1

3. Build cache for newly installed yum repositories.

# dnf makecache

4. Now we can install CouchDB software by using dnf command.

# dnf install -y couchdb

Install and Configure Fail2ban on Red Hat Enterprise Linux 8 - Step by Step Process ?

This article covers the installation of Fail2ban and the configuration of an sshd filter. There are so many options to configure but we focused on the basic ones. Feel free to peruse the Fail2ban man pages by running man fail2ban to discover what more you can do with it.

Fail2ban is a free, open-source and widely used intrusion prevention tool that scans log files for IP addresses that show malicious signs such as too many password failures, and much more, and it bans them (updates firewall rules to reject the IP addresses). 

By default, it ships with filters for various services including sshd.


To install  and configure Fail2ban on CentOS/RHEL 8:

1. After logging into your system, access a command-line interface, then enable the EPEL repository on your system:

# dnf install epel-release

OR

# dnf install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm

2. Afterward, install the Fail2ban package by running the following command:

# dnf install fail2ban

3. To start and enable the fail2ban service for now and check if it is up and running using the following systemctl command:

# systemctl start fail2ban
# systemctl enable fail2ban
# systemctl status fail2ban

Install LAMP Stack on Red Hat Enterprise Linux 8 - Step by Step Process ?

This article covers the installation of the LAMP stack (i.e., Linux, Apache, MariaDB, and PHP) on RHEL 8.

LAMP stands for Linux, Apache, MariaDB/MySQL and PHP, all of which are open source.


With the yum commands below, install LAMP stack:

# Will automatically update

$ sudo yum -y update

# Will automatically install Apache/HTTPD

$ sudo yum -y install httpd


To Install MariaDB Database Server on CentOS 8/RHEL 8:

1. Enter the following command to install MariaDB on CentOS 8/RHEL 8.

# dnf install mariadb-server mariadb -y

2. After it's installed, we need to start it.

# systemctl start mariadb

3. Enable auto start at system boot time.

# systemctl enable mariadb

4. Check status:

# systemctl status mariadb

Configure WordPress on Ubuntu Server with Apache - Step by step process to do it ?

This article covers setup WordPress — including Apache, MySQL, and PHP, on the Ubuntu Linux server. WordPress is the most popular CMS (content management system) on the internet. It allows you to easily set up flexible blogs and websites on top of a MySQL backend with PHP processing. WordPress has seen incredible adoption and is a great choice for getting a website up and running quickly. After setup, almost all administration can be done through the web frontend.


How to install PHP Extensions on Ubuntu?

1. You can download and install some of the most popular PHP extensions for use with WordPress by executing the commands:

$ sudo apt update
$ sudo apt install php-curl php-gd php-mbstring php-xml php-xmlrpc php-soap php-intl php-zip

2. Then restart Apache to load these new extensions in the next section. 

If you are returning here to install additional plugins, you can restart Apache now by running:

$ sudo systemctl restart apache2


To install WordPress on Ubuntu:

1. Change into a writable directory and then download the compressed release by typing:

$ cd /tmp
$ curl -O https://wordpress.org/latest.tar.gz

2. Extract the compressed file to create the WordPress directory structure:

$ tar xzvf latest.tar.gz

3. Add a dummy .htaccess file so that this will be available for WordPress to use later.

Create the file by typing:

$ touch /tmp/wordpress/.htaccess

4. Copy over the sample configuration file to the filename that WordPress actually reads:

$ cp /tmp/wordpress/wp-config-sample.php /tmp/wordpress/wp-config.php

5. Create the upgrade directory, so that WordPress won't run into permissions issues when trying to do this on its own following an update to its software:

$ mkdir /tmp/wordpress/wp-content/upgrade

6. Copy the entire contents of the directory into our document root:

$ sudo cp -a /tmp/wordpress/. /var/www/wordpress

Install and Configure Apache Kafka on Ubuntu 20.04 - Step by Step process to implement this task ?

This article covers how to install and configure Apache Kafka on your Ubuntu 20.04 LTS machine. Apache Kafka is a distributed events streaming platform which has the ability to handle the high-performance data pipelines. It was originally developed by Linkedin then to be public as an open-source platform and used by many IT companies in the world.


Terms related to Apache Kafka Infrastructure:

1. Topic: A topic is a common name used to store and publish a particular stream of data. For example if you would wish to store all the data about a page being clicked, you can give the Topic a name such as "Added Customer".


2. Partition: Every topic is split up into partitions ("baskets"). When a topic is created, the number of partitions need to be specified but can be increased later as need arises. Each message gets stored into partitions with an incremental id known as its Offset value.


3. Kafka Broker: Every server with Kafka installed in it is known as a broker. It is a container holding several topics having their partitions.


4. Zookeeper: Zookeeper manages Kafka's cluster state and configurations.


Main advantages of using Apache Kafka:

1. Message Broking: In comparison to most messaging systems Kafka has better throughput, built-in partitioning, replication, and fault-tolerance which makes it a good solution for large scale message processing applications


2. Website Activity Tracking


3. Log Aggregation: Kafka abstracts away the details of files and gives a cleaner abstraction of log or event data as a stream of messages.


4. Stream Processing: capturing data in real-time from event sources; storing these event streams durably for later retrieval; and routing the event streams to different destination technologies as needed


5. Event Sourcing: This is a style of application design where state changes are logged as a time-ordered sequence of records.


6. Commit Log: Kafka can serve as a kind of external commit-log for a distributed system. The log helps replicate data between nodes and acts as a re-syncing mechanism for failed nodes to restore their data.


7. Metrics: This involves aggregating statistics from distributed applications to produce centralized feeds of operational data.


To install Apache Kafka on Ubuntu:

1. Update your fresh Ubuntu 20.04 server and get Java installed as illustrated below.

$ sudo apt update && sudo apt upgrade
$ sudo apt install default-jre wget git unzip -y
$ sudo apt install default-jdk -y

2. Fetch Kafka on Ubuntu 20.04.

$ cd ~
$ wget https://downloads.apache.org/kafka/2.6.0/kafka_2.13-2.6.0.tgz
$ sudo mkdir /usr/local/kafka-server && cd /usr/local/kafka-server
$ sudo tar -xvzf ~/kafka_2.13-2.6.0.tgz --strip 1

3. Create Kafka and Zookeeper Systemd Unit Files

i. Let us begin with Zookeeper service.

$ sudo vim /etc/systemd/system/zookeeper.service
[Unit]
Description=Apache Zookeeper Server
Requires=network.target remote-fs.target
After=network.target remote-fs.target
[Service]
Type=simple
ExecStart=/usr/local/kafka-server/bin/zookeeper-server-start.sh /usr/local/kafka-server/config/zookeeper.properties
ExecStop=/usr/local/kafka-server/bin/zookeeper-server-stop.sh
Restart=on-abnormal
[Install]
WantedBy=multi-user.target


ii. Then for Kafka service. Make sure your JAVA_HOME configs are well inputted or Kafka will not start.

$ sudo vim /etc/systemd/system/kafka.service
[Unit]
Description=Apache Kafka Server
Documentation=http://kafka.apache.org/documentation.html
Requires=zookeeper.service
After=zookeeper.service
[Service]
Type=simple
Environment="JAVA_HOME=/usr/lib/jvm/java-11-openjdk-amd64"
ExecStart=/usr/local/kafka-server/bin/kafka-server-start.sh /usr/local/kafka-server/config/server.properties
ExecStop=/usr/local/kafka-server/bin/kafka-server-stop.sh
Restart=on-abnormal
[Install]
WantedBy=multi-user.target


iii. Reload the systemd daemon to apply changes and then start the services. 

$ sudo systemctl daemon-reload
$ sudo systemctl enable --now zookeeper
$ sudo systemctl enable --now kafka
$ sudo systemctl status kafka zookeeper


4. Install Cluster Manager for Apache Kafka (CMAK) | Kafka Manager.

$ cd ~
$ git clone https://github.com/yahoo/CMAK.git


5. Configure CMAK on Ubuntu.

Install Apache Web Server on CentOS 8 - Step by Step process to do it ?

This article covers how to install Apache web server on CentOS 8 distribution. With Apache we server, you can host web pages over the network. Apache is available within CentOS's default software repositories, which means you can install it with the dnf package manager.


To install Apache on CentOS:

1. Execute the command below to install the Apache package:

$ sudo dnf install httpd

After confirming the installation, dnf will install Apache and all required dependencies.

2. If you also plan to configure Apache to serve content over HTTPS, you will also want to open up port 443 by enabling the https service:

$ sudo firewall-cmd --permanent --add-service=https

3. Next, reload the firewall to put these new rules into effect:

$ sudo firewall-cmd --reload

After the firewall reloads, you are ready to start the service and check the web server.


To check your Apache Web Server:

1. Apache does not automatically start on CentOS once the installation completes, so you will need to start the Apache process manually:

$ sudo systemctl start httpd

2. Verify that the service is running with the following command:

$ sudo systemctl status httpd

You will receive an active status when the service is running.


To manage the Apache Process on CentOS:

Now that the service is installed and running, you can now use different systemctl commands to manage the service.

1. To stop your web server, type:

$ sudo systemctl stop httpd

2. To start the web server when it is stopped, type:

$ sudo systemctl start httpd

3. To stop and then start the service again, type:

$ sudo systemctl restart httpd

4. If you are simply making configuration changes, Apache can often reload without dropping connections. To do this, use this command:

$ sudo systemctl reload httpd

5. By default, Apache is configured to start automatically when the server boots. If this is not what you want, disable this behavior by typing:

$ sudo systemctl disable httpd

6. To re-enable the service to start up at boot, type:

$ sudo systemctl enable httpd

Apache will now start automatically when the server boots again.

Install and Configure Apache Web Server with Virtual Host on Debian 10 - Do it now ?

This article covers how to perform installation and configuration of Apache web server on Debian 10.

Also, you will learn how to create virtual hosts on an Apache server and troubleshoot errors. These steps are almost the same for Ubuntu and LinuxMint distributions.

Apache HTTP Server is a free and open-source web server that delivers web content through the internet. It is commonly referred to as Apache and after development, it quickly became the most popular HTTP client on the web.


On most systems if you installed Apache with a package manager, or it came preinstalled, the Apache configuration file is located in one of these locations: /etc/apache2/httpd. conf. /etc/apache2/apache2.


Debian/Ubuntu Linux Specific Commands to Start/Stop/Restart Apache:

1. Restart Apache 2 web server, enter: # /etc/init.d/apache2 restart. $ sudo /etc/init.d/apache2 restart.

2. To stop Apache 2 web server, enter: # /etc/init.d/apache2 stop.

3. To start Apache 2 web server, enter: # /etc/init.d/apache2 start.


To check running status of LAMP stack:

1. For Ubuntu: # service apache2 status.

2. For CentOS: # /etc/init.d/httpd status.

3. For Ubuntu: # service apache2 restart.

4. For CentOS: # /etc/init.d/httpd restart.

5. You can use mysqladmin command to find out whether mysql is running or not.

Install Linux, Apache, MariaDB, PHP (LAMP) Stack on Debian 10 - Step by step process to do it ?

This guide will help you on how to #install the LAMP stack (Linux, Apache, MariaDB, and PHP ) in your #Debian system. 

LAMP stands for Linux, Apache, MySQL, and PHP. Together, they provide a proven set of software for delivering high-performance web applications.

For a web application to work smoothly, it has to include an operating system, a web server, a database, and a programming language. 

A LAMP Stack is a set of open-source software that can be used to create websites and web applications. 

LAMP is an acronym, and these stacks typically consist of the Linux operating system, the Apache HTTP Server, the MySQL relational database management system, and the PHP programming language.

To Install #LAMP stack on Ubuntu:

1. Update your system. sudo apt-get update.

2. Install Mysql. sudo apt-get install mysql-server mysql-client libmysqlclient-dev.

3. Install #Apache server.

4. Install #PHP (php7.0 latest version of PHP).

5. Install #Phpmyadmin (for #database).

Steps to install Apache web server on Ubuntu 20.04 LTS ?

This article will guide you on steps to #install and configure #Apache on #Linux server.

Apache is one of the most popular web servers that allows you to run a secure website without too much of a headache.

#HTTPD is a program that is (essentially) a program known as Apache Web server. The only difference I can think of is that on Ubuntu/Debian the binary is called apache2 instead of httpd which is generally what it is referred to as on RedHat/CentOS. Functionally they are both 100% the same thing.

Apache server root will be located in /etc/httpd. The path to the apache #program will be /usr/sbin/httpd. In the document root three directories are created: cgi-bin, html and icons.

By default, Apache web server is instructed to listen for incoming connection and bind on port 80. If you opt for the TLS configuration, the server will listen for secure connections on port 443.

To start Apache server on Debian / Ubuntu Linux Specific Commands to Start/Stop/Restart Apache:

1. Restart Apache 2 web server, enter: # /etc/init.d/apache2 restart. $ sudo /etc/init.d/apache2 restart.

2. To stop Apache 2 web server, enter: # /etc/init.d/apache2 stop.

3. To start Apache 2 web server, enter: # /etc/init.d/apache2 start.

Steps to Configure and host an application in Apache web server in Linux ?

This article will guide you on the basics of #Apache configurations on Linux. This includes #firewall configuration, managing Apache services, setting up virtual hosts, changing default listening #ports, and allowing/denying specific IPs from accessing the #sites. For more information about Apache configurations, visit Apache server official documentation at http://httpd.apache.org/docs/. Apache #HTTP Server is a free and open-source web server that delivers web content through the internet. It is commonly referred to as Apache and after development, it quickly became the most popular HTTP client on the web. To Set Up Virtual Hosts in Apache: 1. Set up a #domain name. The server block that is enabled by default is capable of serving documents from /var/www/html. 2. Enable the domain configuration file. 3. Test for errors. 4. Test if Apache is serving your domain name.