Create a DynamoDB Table in AWS - Step by step guide ?

This article covers how to create a DynamoDB table, add items to the table, and then queried the table to find the item we want. In fact, We can use DynamoDB to build powerful web applications that automatically scale up and down, build interactive mobile and web apps with real-time updates.

Also, you will learn how to manage our DynamoDB tables and items through the AWS Management Console and delete it.

WordPress error "Destination Folder Already Exists" – Fix it Now ?

This article covers methods to fix WordPress error "Destination Folder Already Exists".

Basically, this WordPress error triggers when a folder with the same name as that of the plugin or theme already exists. 


To resolve WordPress "Destination folder already exists" error:

Since the error is caused by a plugin or theme folder that already exists, the easiest way to solve the error is by deleting the folder. 

The process of deleting a theme via FTP is the same one you use for deleting a plugin. 

The only exception is that you need to navigate to wp-content/themes instead of wp-content/plugins. 

1. To delete the plugin folder, connect to your server using your FTP credentials and navigate to your root WordPress directory, often called public_html.

2. Then, go to the wp-content/plugins directory.

3. Within the plugins directory, find the plugin folder mentioned in the error message.

4. When you've located the folder you need, right-click on it and press the Delete option from the menu that appears.

5. After that, you will be prompted to confirm your choice. Press the Yes button to proceed.

6. Then, you will have to wait a bit until the plugin folder, as well as all directories and files within it, are deleted. 

Cloudflare err_ssl_protocol_error - Fix it Now ?

This article covers methods to resolve Cloudflare ERR_SSL_PROTOCOL_ERROR. Basically, this error happens as a result of a number of reasons that include wrong DNS settings, SSL mode, TLS version or issues with SSL certificate. 


To fix this error,

1. If you are not the site owner, contact the site owner and let them know you are having issues accessing their site.

2. The domain name has not fully been set to use Cloudflare yet. Check to see if there are non-Cloudflare nameservers that are conflicting with the assigned Cloudflare name servers.

3. You are signed up for Cloudflare, but you have set a DNS record to :grey:. If you have a subdomain or hostname and that serves HTTP/HTTPS traffic, we would advise that you :orange: this DNS record to take advantage of Cloudflare’s security and performance features. See What subdomains are appropriate for :orange:/:grey: clouds? 69

4. The Free Universal SSL certificate hasn’t yet been deployed, :grey: (deactivate) Cloudflare so that your website can continue to use your origin’s SSL certificate. Wait 24 hours and :orange: (activate) Cloudflare again to see if your SSL certificate has been successfully deployed.

5. You have some conflict with TLS 1.3, disable it and see if you still encounter the error.

6. You have selected Full SSL (strict) under your SSL/TLS app, but your origin does not have a valid certificate (i.e., it is expired, self-signed, or not issued by a trusted CA). Temporarily select another SSL option until you have a valid origin certificate in place.

7. Try to look at developer web console (firefox Ctrl+Shift+K) - anything interesting under Security tab.

8. Also, Try to run the command curl -vk on the affected domain.

WordPress error "Installation failed, could not create directory" - Fix it Now ?

This article covers methods to fix WordPress error "Installation failed, could not create directory". Basically, this WordPress error happens when there exist insufficient disk space, incorrect folder permission and so on. 

Your WordPress site's plugins and themes provide important functionality for you and your users.

Encountering an error when attempting to install or update one can throw a wrench in your plans and slow down your progress.

To determine if a file permissions issue is causing a plugin or theme installation error on your site, you can use the Site Health tool or check out your server's error log. 

After that, resetting your permissions using FTP should only take a few minutes.

Can't read from the source file or disk - Fix it Now ?

This article covers how to fix "can't read from the source file or disk" error.
Basically, this error triggers when trying to copy certain files to or from an external hard disk.
Many users have reported that they got "Can't read from the source file or disk" error message while copying, deleting or moving files from one location to another.

To fix Error Message: Can't read from the source file or disk:
1. Restart the PC
If you can't read from the source file or disk while copying in Windows 10, and this happens for the first time, try restarting the computer (do not turn off and on, just restart).
Rebooting helps the computer deal with such errors on its own and returns it to an adequate working state.
2. Check the file name
Changing the file name is justified when the file was created in one OS, and its use occurs in another. You may not be able to read from the source file or disk while deleting after using this file on the command line. If this is your situation, be sure to rename the file properly and restart the computer after that.
3. Try to open the file on another PC
Try to do the same as in method 2, but on another PC. Better yet, if it will be a completely different OS (for example, you have Windows installed, then look for a computer with a Mac, etc.).
This will help get rid of any conflicts between the file and the computer, which can happen quite often.
4. Use chkdsk to fix bad sectors
The free chkdsk utility usually handles such errors with ease.

Disk full due to large System Volume Information Folder on Windows

This article covers how to access System Volume Information Folder and clear up the disk space.
Basically, the disk full warning in windows can also happen due to the large System Volume Information Folder.

What is System Volume Information Folder in Windows?

1. WindowsImageBackup —system restore points on desktop Windows versions or System State backups made using Windows Server Backup (wbadmin) in server OSs;
2. The contents of Indexing Service database used for fast file search (including Outlook search);
3. Distributed Link Tracking Service database;
4. Disk snapshots made by Volume Shadow Copy, which can be used to recover older versions of files. For each snapshot, a separate file is created with a long ID as a name;shadow copy files on system volume information folder
5. NTFS disk quota settings;
6. Base and chunks of the Data Deduplication service;
7. DFS Replication database (dfsr.db);
8. WPSettings.dat file – created by the storage service (StorSvc);
9. The USB drives will also store an IndexerVolumeGuid file that defines the unique disk label used by the Windows Search service;
10. AppxProgramDataStaging, AppxStaging – Windows UWP app backups (it can be used for recovery after removal).

Set Up Amazon WorkSpaces - Step by Step Process

This article covers how to set up Amazon WorkSpaces for our customers. Amazon WorkSpaces is a managed, secure Desktop-as-a-Service (DaaS) solution. With Amazon WorkSpaces, your users get a fast, responsive desktop of their choice that they can access anywhere, anytime, from any supported device.

With Amazon WorkSpaces, you can provision virtual, cloud-based Microsoft Windows or Amazon Linux desktops for your users, known as WorkSpaces.

Generally, Workspaces are meant to reduce clutter and make the desktop easier to navigate. Workspaces can be used to organize your work. For example, you could have all your communication windows, such as e-mail and your chat program, on one workspace, and the work you are doing on a different workspace.

The Amazon WorkSpaces Free Tier provides two Standard bundle WorkSpaces with 80 GB Root and 50 GB User volumes, running in AutoStop mode, for up to 40 hours of combined use per month, for two calendar months, from the time you create your first WorkSpace.


Key Features of Amazon WorkSpaces:

1. The end-users can access the documents, applications, and resources using devices of their choice such as laptops, iPad, Kindle.

2. Network Health Check-Up verifies if the network and Internet connections are working. Also, checks if  WorkSpaces and their associated registration services are accessible, and checks if port 4172 is open for UDP and TCP access or not.

3. Client Reconnect feature allows the users to access their WorkSpace without entering their credentials every time when they disconnect.

4. Auto Resume Session feature allows the client to resume a session that gets disconnected due to any reason in network connectivity within 20 minutes by default. This can be extended for 4 hours. However, the users can disable this feature any time in the group policy section.

5. Console Search feature allows Administrators to search for WorkSpaces by their user name, bundle type, or directory.


Some AWS Limitations:

1. AWS service limits. AWS service limits are set by the platform.

2. Technology limitations. An exceptional characteristic of this limiting factor is that it can be applied to all Cloud services, not just on AWS.

3. Lack of relevant knowledge by your team.

4. Technical support fee.

5. General Cloud Computing issues.

Boot an EC2 Windows instance into DSRM - How to perform this task

This article covers how to boot an EC2 Windows instance into DSRM. If an instance running Microsoft Active Directory experiences a system failure or other critical issues you can troubleshoot the instance by booting into a special version of Safe Mode called Directory Services Restore Mode (DSRM). In DSRM you can repair or recover Active Directory.


How to Configure an Instance to Boot into DSRM?

1. To boot an online instance into DSRM using the System Configuration dialog box

i. In the Run dialog box, type msconfig and press Enter.

ii. Choose the Boot tab.

iii. Under Boot options choose Safe boot.

iv. Choose Active Directory repair and then choose OK. The system prompts you to reboot the server.


2. To boot an online instance into DSRM using the command line

From a Command Prompt window, run the following command:

$ bcdedit /set safeboot dsrepair

If an instance is offline and unreachable, you must detach the root volume and attach it to another instance to enable DSRM mode.

Amazon Redshift - Its features and how to set it up

This article covers an effective method to set up Amazon Redshift. Amazon Redshift is a fully managed, petabyte-scale data warehouse service in the cloud. This enables you to use your data to acquire new insights for your business and customers. The first step to create a data warehouse is to launch a set of nodes, called an Amazon Redshift cluster.

Amazon Redshift is a relational database management system (RDBMS), so it is compatible with other RDBMS applications. Amazon Redshift and PostgreSQL have a number of very important differences that you need to take into account as you design and develop your data warehouse applications.

Amazon Redshift is based on PostgreSQL.

Amazon Redshift is specifically designed for online analytic processing (OLAP) and business intelligence (BI) applications, which require complex queries against large datasets.


What is the difference between Amazon Redshift and Amazon Redshift Spectrum and Amazon Aurora?

Amazon Simple Storage Service (Amazon S3) is a service for storing objects, and Amazon Redshift Spectrum enables you to run Amazon Redshift SQL queries against exabytes of data in Amazon S3.

Both Amazon Redshift and Amazon RDS enable you to run traditional relational databases in the cloud while offloading database administration. 

Customers use Amazon RDS databases primarily for online-transaction processing (OLTP) workload while Redshift is used primarily for reporting and analytics.

AWS Instance loses network connectivity - Fix this issue now

This article covers method to fix AWS Instance loses network connectivity error.

Basically, AWS Instance loses network connectivity if the instance has the wrong time set.


To fix Amazon EC2 Windows instance network connectivity issue:

You can create a temporary elastic network interface, and attach the network interface to the Amazon EC2 Windows instance. Then, you can  temporarily connect to the instance and fix the issue.

1. Open the Amazon EC2 console, and then choose Instances from the navigation pane.

2. Select your instance. From the Description tab, note the Subnet ID.

3. Create a new network interface in the same subnet as the instance.

Important: Be sure to select a security group that allows incoming Remote Desktop Protocol (RDP) traffic from your IP address.

4. Attach the new network interface to the instance.

Note: The network interface might take a few minutes to come online. If you connect to the instance using RDP, associate an Elastic IP address with the network interface.

5. Using the new network interface, connect to the instance using RDP.

6. Change the network connection settings in Windows to use DHCP. Or, specify the correct private IP address settings. For instructions, see Configuring a secondary private IPv4 address for your Windows instance.

7. Detach the temporary network interface.

Note: If you've associated an Elastic IP address with the network interface, and no longer need the Elastic IP address, release the Elastic IP address.

Set up Amazon CloudFront with WordPress site - Do it now

This article covers how to set up Amazon CloudFront with WordPress site. WordPress performs reasonably well out of the box, but there is room for improvement—the number of WordPress plugins that address performance is evidence of this.  However, the easiest way to improve the user experience is to accelerate one's entire WordPress website by using CloudFront. 

Doing this will not only improve your site's responsiveness, but it may also reduce the overall cost of operating your WordPress infrastructure, as reducing the load on your web servers may help you scale down the required infrastructure. 

In fact, CloudFront can significantly help your site cope with an unexpected load when your site gets popular.


How does CloudFront help?

Many AWS customers have users spread across the globe that they want to reach. However, what once required an immense engineering effort can now be easily built using AWS Regions and Edge locations, which allow you to serve content from the locations closest to those users.

Data transfers on the internet depend largely on global networks of fiber optic cables, allowing very high bandwidth data transfers. 


As the speed of light is proving a difficult challenge to overcome, Amazon CloudFront improves the experience for users accessing your websites in several other ways, including:

1. Anycast DNS ensures your customers are routed to the nearest edge location.

2. Cached content, when available, is delivered to your users from the edge location.

3. When data needs to be fetched from your site CloudFront optimizes network throughput by managing the transfers between Edge Locations and your website.  This traffic runs over the Amazon Global Backbone, where optimized TCP configuration ensures more bytes are in-flight on the network, improving throughput, while TCP connection re-use eliminates much of the latency associated with establishing connections.   In this way, whether content is cached or not, it will be accelerated by delivery over optimized network paths.

4. Finally, negotiating and offloading Transport Layer Security (TLS) at the CloudFront Edge further improves performance, reducing connection setup latency, and further supporting back-end connection re-use.

How to setup AWS CloudFront and how it delivers content

This article covers how to setup AWS CloudFront. Basically, CloudFront retrieves data from the Amazon S3 bucket and distributes it to multiple datacenter locations.

Amazon CloudFront works seamlessly with Amazon Simple Storage Service (S3) to accelerate the delivery of your web content and reduce the load on your origin servers. 


Amazon CloudFront is a web service that speeds up distribution of your static and dynamic web content, such as . html, . css, . js, and image files, to your users.


Benefit of CloudFront?

Great Performance. The AWS CloudFront content delivery network optimizes for low latency and high information transfer speeds. 

CloudFront's intelligent routing predicate on real-world latency measurements incessantly gathered from standard websites, as well as Amazon.com.


Step by step process on getting started in the AWS Console, configuring your origin, and beginning testing your CloudFront distribution:

1. Go to the AWS Console

2. Create an Amazon S3 bucket

3. Create an Amazon CloudFront distribution

4. Specify your distribution settings

5. Configure your origin

6. Configure Origin Access Identity

7. Configure default cache behavior

8. Configure your TTLs

9. Configure additional features

10. Test your CloudFront distribution

Redis Slow Log - More about it

This article covers how Redis Slow Log works. Redis Slow #Log is one of the best tools to debug and trace the Redis database. 

The Redis Slow Log is a system to log queries that exceeded a specified execution time. 

The execution time does not include I/O operations like talking with the client, sending the reply and so forth, but just the time needed to actually execute the command (this is the only stage of command execution where the thread is blocked and can not serve other requests in the meantime).


You can configure the slow log with two parameters: 

1. slowlog-log-slower-than tells Redis what is the execution time, in microseconds, to exceed in order for the command to get logged. Note that a negative number disables the slow log, while a value of zero forces the logging of every command. 

2. slowlog-max-len is the length of the slow log. The minimum value is zero. When a new command is logged and the slow log is already at its maximum length, the oldest one is removed from the queue of logged commands in order to make space.


Redis Slow Log configuration can be done by editing redis.conf or while the server is running using the CONFIG GET and CONFIG SET commands.

Available since 2.2.12.

This #command is used in order to read and reset the Redis slow queries log.


Redis slow log overview

The #Redis Slow Log is a system to log queries that exceeded a specified execution time. 

Slowlog, as its name, is used to record commands whose execution time exceeds limitation (a little slow).

The execution time does not include I/O operations like talking with the client, sending the reply and so forth, but just the time needed to actually execute the command (this is the only stage of command execution where the thread is blocked and can not serve other requests in the meantime).

The Redis SLOWLOG is used to help identify queries which are taking too long to execute.


You can configure the slow log with two parameters:

slowlog-log-slower-than tells Redis what is the execution time, in microseconds, to exceed in order for the command to get logged. Note that a negative number disables the slow log, while a value of zero forces the logging of every command. slowlog-max-len is the length of the slow log. The minimum value is zero. When a new command is logged and the slow log is already at its maximum length, the oldest one is removed from the queue of logged commands in order to make space.


The configuration can be done by editing redis.conf or while the server is running using the CONFIG GET and CONFIG SET commands.

Configure AWS load balancer with Cloudformation

This article will guide you on how to create an Application Load balancer and its dependencies using CloudFormation. 

Load balancing is defined as the methodical and efficient distribution of network or application traffic across multiple servers in a server farm. 

Each load balancer sits between client devices and backend servers, receiving and then distributing incoming requests to any available server capable of fulfilling them.

Software load balancers is that hardware load balancers require proprietary, rack-and-stack hardware appliances, while software load balancers are simply installed on standard x86 servers or virtual machines.

Another critical difference between hardware and software load balancers lies in the ability to scale.


Elastic Load Balancing supports the following types of load balancers: 

1. Application Load Balancers, Network Load Balancers, and Classic Load Balancers. 

2. Amazon ECS services can use either type of load balancer. 

3. Application Load Balancers are used to route HTTP/HTTPS (or Layer 7) traffic.

AWS error code 0x204

This article will guide you on methods to fix AWS #error code 0x204 which happens in the process of trying to login to a remote machine on VPC.

Amazon Virtual Private #Cloud (Amazon #VPC) is a service that lets you launch AWS resources in a logically isolated virtual network that you define. You can use both IPv4 and IPv6 for most resources in your virtual private cloud, helping to ensure secure and easy access to resources and applications.


To enable RDP access on AWS instance:

i. Open the Amazon EC2 console , set it to the stack's region, and choose Security Groups from the navigation pane. 

ii. Choose AWS-OpsWorks-RDP-Server, choose the Inbound tab, and choose Edit. 

iii. Choose Add Rule and specify the following settings: Type – RDP.


To connect from the #Amazon EC2 console:

1. Open the Amazon #EC2 console.

2. In the left navigation pane, choose Instances and select the instance to which to connect.

3. Choose Connect.

4. On the Connect To Your Instance page, choose EC2 Instance Connect (browser-based SSH connection), Connect.

Build serverless web application with AWS lambda

This article will guide you on how to build serverless Web Application AWS #Lambda. 

1. The application architecture uses #AWS Lambda, Amazon API Gateway, Amazon DynamoDB, Amazon Cognito, and AWS Amplify Console. 

2. Amplify Console provides continuous deployment and hosting of the static web resources including HTML, CSS, JavaScript, and image files which are loaded in the user's browser. 

3. JavaScript executed in the browser sends and receives data from a public backend API built using Lambda and API Gateway. 

4. Amazon Cognito provides user management and authentication functions to secure the backend API. 

5. Finally, #DynamoDB provides a persistence layer where data can be stored by the API's Lambda function.

Troubleshoot Redis latency Issues

This article will guide you on steps to troubleshoot Redis #latency problems.

#Amazon #ElastiCache allows you to seamlessly set up, run, and scale popular open-source compatible in-memory data stores in the cloud. 

Build data-intensive apps or boost the performance of your existing databases by retrieving data from high throughput and low latency in-memory data stores.

#Redis #performance monitoring metrics:

1. Used Memory

"memory_used" gives the total amount of memory in bytes that is used by the Redis server. If it exceeds physical memory, system will start swapping causing severe performance degradation.

2. Peak used memory

"memory_used_peak" metric calculates and displays the highest amount of memory in bytes consumed by the Redis server.

3. Used CPU system

The metric "cpu_used_sys" gets the total amount of system CPU consumed by the Redis server. High CPU usage is not bad as long as it doesn't exceed CPU limit.

4. Used CPU user

The metric "cpu_used_user" records the total amount of user CPU consumed by the Redis server.

5. Used CPU user children

The metric "cpu_used_user_children" records the total amount of user CPU consumed by other background processes.

6. Used CPU system children

Get the total amount of system #CPU consumed by background processes with the metric "cpu_used_sys_children".

7. Rejected connections

Use the metric "total_conn_rec" and get the total number of connections accepted by the Redis server.

8. Connected clients

Get the total number of slave connections made to the Redis server with the metric "conn_slaves".

AWS security vulnerabilities

This article will guide you on how to create a virtual machine using #Lightsail in AWS.

AWS Cloud Compliance enables you to understand the robust controls in place at AWS to maintain security and data protection in the cloud. 

The IT infrastructure that AWS provides to its customers is designed and managed in alignment with best #security practices and a variety of IT security standards.

AWS WAF is a web application #firewall that helps protect your web applications or APIs against common web exploits that may affect availability, compromise security, or consume excessive resources.

List of AWS Limitations:

1. #AWS service limits. AWS service limits are set by the platform.

2. Technology limitations. An exceptional characteristic of this limiting factor is that it can be applied to all Cloud services, not just on AWS.

3. Lack of relevant knowledge by your team.

4. Technical support fee.

5. General Cloud Computing issues.

Django 400 bad request

This article will guide you on methods to resolve the #Django 400 bad request which is caused due to many reasons which include incorrect syntax, corrupt extensions, incorrect URL, and so on.

The 400 Bad Request #error is an #HTTP status code that means that the request you sent to the website server, often something simple like a request to load a web page, was somehow incorrect or corrupted and the server couldn't understand it.

To resolve 400 Bad Request:

1. Check for errors in the URL.

2. Clear Browser Cache and cookies.

3. Clear DNS Cache.

4. Check your File upload Size.

5. Deactivate Browser Extensions.


Copy rds snapshot to s3

This article will guide you on resolve common rds #error. Basically, the process to copy rds snapshot to s3 is simple and creates and saves backups of the DB instance in the Amazon S3 bucket. 

Amazon Relational Database Service (#Amazon RDS) makes it easy to set up, operate, and scale a relational database in the cloud. It provides cost-efficient and resizable capacity while automating time-consuming administration tasks such as hardware provisioning, database setup, patching and backups.

RDS creates a storage volume snapshot of your #DB instance, backing up the entire DB instance and not just individual databases. RDS saves the automated backups of your DB instance according to the backup retention period that you specify.

To copy a #RDS snapshot from one region to another:

1. Create a #snapshot of your RDS.

2. In your newly created snapshot go to Actions -> Copy Snapshot.

3. Click orange View snapshots in destination region.

4. In the target region's snapshots table find your copied snapshot, and wait until status "Copying" becomes "Completed".

5. Select the snapshot, click Actions -> Restore Snapshot.

Create a virtual machine using lightsail in AWS

This article will guide you on how to create a virtual #machine using Lightsail in #AWS.

#Lightsail is an easy-to-use virtual private server (#VPS) that offers you everything needed to build an application or website, plus a cost-effective, monthly plan.

To create a virtual machine in #cloud:

1. Using the left-hand navigation bar, click Compute Engine and then select #VM instances from the item list. 

2. If this is your first #VM on the platform. 

3. If you have a VM template you can import it to GCP, but in this case we will create a VM from scratch.

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.

Handle Errors in Serverless Applications with AWS

This article will guide you how to handle #errors in Serverless Applications with AWS Step Functions. Combining AWS Step Functions with AWS Lambda makes it simple to orchestrate #AWS #Lambda functions for serverless applications.

To help you deal with errors in Lambda applications, Lambda integrates with services like #Amazon CloudWatch and AWS X-Ray. You can use a combination of logs, metrics, alarms, and tracing to quickly detect and identify issues in your function code, API, or other resources that support your application.

Lambda functions can fail in three cases:

i. An unhandled exception is raised — whether if we received an invalid input, an external API failed, or just a programming bug occurred.

ii. Timeout — Lambda running longer than the configured timeout duration is violently closed with a ‘Task timed out after … seconds’ message. The default value is 6 seconds, and the maximal value is 5 minutes.

iii. Out of memory — In this case, the lambda usually terminates with ‘Process exited before completing request’. The ‘Memory Size’ is equal to ‘Max Memory Used’.

How to set up Amazon S3 through WHM

This article will guide you on how to configure Amazon S3 via WHM by accessing the 'Backup Configuration'.
To configure your #backups:
i. Login to #WHM and access "Backup Configuration >> Additional Destinations".
ii. Select #Amazon #S3 and click “Create new destination”.

Steps to Setup Ansible AWS Dynamic Inventory

This article will guide you on how to use #AWS resources using Ansible with the help of Dynamic Inventory.

The #Ansible #inventory file defines the #hosts and groups of hosts upon which #commands, #modules, and tasks in a playbook operate. The file can be in one of many formats depending on your Ansible #environment and plugins.

Ansible will use it as an inventory source as long as it returns a #JSON structure like the one above when the script is called with the --list .

Create a Nagios log server instance in Amazon EC2 cloud

This article will guide you on how to create a #Nagios log server instance in the amazon ec2 #cloud. To enable these reports, simply enable Detailed Billing Reports With #Resources and Tags for your account. Then open up the Reports tab of the Billing #Console. From there you can look at the EC2 Instance Usage Report and the #EC2 Reserved Instance Utilization Report.

How to Run AWS Amazon DynamoDB Steps to do it

This article will guide you on how to set up #Amazon DynamoDB which can be downloaded as an executable .jar file.

#DynamoDB uses hashing and B-trees to manage #data. Upon entry, data is first distributed into different partitions by hashing on the #partition key. Each partition can store up to 10GB of data and handle by default 1,000 write capacity units (WCU) and 3,000 read capacity units (RCU).

Amazon Web Services Kinesis

This article will guide you on how to use #Amazon #Kinesis which is a #cloud based #service that helps in #streaming a large amount of data per second.

Delete s3 data in AWS data pipeline

#AWS Data Pipeline is a web service that you can use to automate the movement and transformation of data.   When you are finished with your #pipeline, you can delete it.


AWS error Instance terminates immediately

This article will guide you on the different methods to resolve AWS error "instance terminates immediately" which occurs due to different reasons.

AWS Config Systems Manager Automation error

This aws error has to do with the AWS Config rule vpc-sg-open-only-to-authorized-ports and Systems Manager Automation document AWS-DisablePublicAccessForSecurityGroup which throws an error "InvalidPermission.NotFound".

An error occurred when calling the RevokeSecurityGroupIngress operation Steps to fix this aws error

This article will guide you on the steps to fix the AWS error "An error occurred when calling the RevokeSecurityGroupIngress operation" which shows that the target security group doesn’t have an inbound rule, or isn’t located in the default Amazon Virtual Private Cloud (Amazon VPC).

Instance limit exceeded error in aws Steps to fix it

This article will guide you on the steps to fix instance limit exceeded error in aws which occurs when trying to launch a new instance or restart a stopped instance thereby triggering the InstanceLimitExceeded error. It generally happens when the default limit of instances per region exceeds.

IAM assign Role to User

This article will guide you through the steps to assign an existing IAM Role to an IAM user.

WordPress Not Sending Email error

If you're experiencing issues with WordPress failing to send emails – for example, sending forms or other communications – it's usually due to problems with your server configuration. 

If your WordPress email is not being sent, switch over to SMTP (Simple Mail Transfer Protocol) instead.

WordPress has several SMTP plugins you can use to force any FROM address you like.

This is important for two major reasons: 

i. It allows you to send email directly through your mail server as opposed to the web server. 

ii. It allows you to send email FROM another email host.

One major reason why this happens is that webhost disable the PHP Mail function because it is very easy to exploit by spammers and hackers.

When WordPress wants to send emails, it calls on the email server in your webhost using the PHP Mail function, but if this function is disabled by your webhost, your requests to send emails will not even get to your mail server.

WordPress fails to send email as a result of the SMTP server on the underlying operating system not being configured properly. 

Proper configuration includes using authentication, configuring the basic SMTP server settings, and following best practices when setting up SPF records, and so on.

This article will guide you on the method to fix WordPress not sending email issue.

How to install and configure Icinga2 on Ubuntu

Icinga 2  helps in the monitoring of core resources on a server thereby serving as a resort of comfort for webmasters and website owners from panic and fear of unnoticed critical service changes within the server environment.

Solve Insufficient instance capacity AWS error

Steps taken to troubleshoot and fix Insufficient instance capacity error in AWS.

Fix AWS Automation execution errors

How to fix common AWS Automation execution errors.

Solving Systems Manager automation errors in Amazon EC2 or AWS Systems Manager Console

Up to date Steps required to troubleshoot Systems Manager automation errors in Amazon EC2 or AWS.

Solve 503 Service Temporarily Unavailable AWS error

Four (4) Methods to solve "503: Service Temporarily Unavailable" in AWS.

Fix AWS Config is currently experiencing unusually high traffic error

Best method to apply in fixing "AWS Config is currently experiencing unusually high traffic." AWS error.

Fix Aws error We are unable to complete the request at this time

Best method to resolve Aws "We are unable to complete the request at this time" error.

An error has occurred with AWS Config Contact AWS Support

Best Method to solve "An error has occurred with AWS Config. Contact AWS Support."

Fix An unexpected internal error occurred with AWS Config

Best Method to fix AWS error "An unexpected internal error occurred with AWS config".

How to solve network error connection timed out error in AWS

Up to date steps we used to fix "network error connection timed out" error in AWS.

Solve Error deleting snapshots in AWS

Best way to fix Error deleting EBS snapshot in AWS.

How to solve AWS was not able to validate the provided access credentials

Comprehensive method of fixing  AWS was not able to validate the provided access credentials

Solution to an error has occurred with AWS Config

Easy way to fix an error has occurred with AWS Config.

How to Fix Boot Hole vulnerability CVE-2020-1073

Just recently, on the 29th, July 2020, Popular Linux Distribution RedHat announced that there was a great security concern in the grub2 (CVE-2020-1073) version.

Install MERN Stack for JS Based Applications on Ubuntu 20.04 - Step by step guide ?

This article covers how to install the MERN stack on your Ubuntu 20.04 system. In fact, The MERN Stack is made from four components: MongoDB, Express, React, and Node. It provides a bundle of JavaScript technologies used for building dynamic JS websites.

Install WordPress on Rocky Linux 8 using the LAMP stack - Step by step guide ?

This article covers how to install WordPress on Rocky Linux 8. In fact, WordPress  is open-source, written in PHP and use a MariaDB/MySQL as a database backend. WordPress is the most popular content management system used to host static and dynamic websites on the Internet. You are now ready to create your blog or website.

Install Harbor Image Registry on Ubuntu 20.04 - Best Method ?

This article covers how to install harbor on Ubuntu. The process is the same for all the other distribution of Linux. Harbor is a component of vSphere with Kubernetes. Harbor provides an enterprise-class registry service. 

Harbor is deployed in a dedicated system namespace on the Supervisor Cluster and is composed of several vSphere Pods. 

Image registries provide a centralized repository for an organization to store container images. 

Public image registries can be used to store container images. However, for security reasons, it is better to use an on-premises image registry. 

You use an on-premises image registry for the following purposes: 

Store container images securely. 

Control access to container images. 

vSphere with Kubernetes is integrated with Harbor and is also compatible with other container image registries. 


Harbor key features includes:

  • Security and vulnerability analysis.
  • Content signing and validation.
  • Extensible API and web UI.
  • Image replication.
  • Role-based access control.
  • Multitenant.


After Harbor installation has succeeded, access Harbor web console on https://registry_domain.

Then Login with:

  • Username: admin
  • Password: Set-in-harbor.yml

Install s3cmd in Linux and Manage Amazon s3 Buckets

This article covers an overview of the s3cmd command-line tool and how you can use it to manage your Amazon S3 storage feature. S3cmd is an Open Source tool that is free for both commercial and private use, but you need to pay only for Amazon resources. so most of the users are using this tool for managing AWS S3 Buckets. S3cmd is a free command-line tool written in Python


How to use the s3cmd command line to manage the Amazon s3 bucket in Linux ?

To use s3cmd command to list s3 bucket, run the command:

# s3cmd ls

This command will list s3bucket from Amazon S3, If you are unable to get the list of the bucket then there will be the following reasons:

  • There is no bucket created in Amazon s3.
  • As you have used IAM user Access Key and Secret Key while configuring the s3cmd tool, please verify IAM user has required permission to access the s3 bucket.
  • If you are using an IAM role then check whether the s3 bucket policy is attached to the EC2 instance or not.

Check CentOS Version - Using Different methods ?

This article covers how to get CentOS version using different methods. There are several ways on how to check what version of CentOS is running on your system. The simplest way to check for the CentOS version number is to execute the cat /etc/centos-release command. Identifying the accurate CentOS version may be required to help you or your support team to troubleshoot your CentOS system.


Different commands to check CentOS version:

  • $ rpm -q centos-release - CentOS version valid for CentOS 6 and higher. Causes to reveal major, minor and asynchronous CentOS version.
  • $ lsb_release -d - Requires redhat-lsb package to be installed before execution.
  • $ rpm -E %{rhel} - RPM macro to reveal a major CentOS version.
  • $ rpm --eval %{centos_ver} - RPM macro to display a major version of CentOS.
  • $ cat /etc/centos-release - Linux cat command to output content of the /etc/centos-release .to query CentOS version. Works with CentOS 6 and higher.

Install Amazon Web Service CLI on Linux Mint 20 - Step by Step Process ?

This article covers how to install the AWS CLI very conveniently on your Linux Mint 20 system and use it for managing the Amazon Web Services very efficiently.
The AWS or Amazon Web Service command line interface is a command line tool for manage our Amazon web services.
AWS CLI provides direct access to the Amazon Web Services public API.
As it is a command line tool, it can also be used to create scripts to automate your Amazon web services.

To the AWS CLI on Ubuntu With APT:
1. First we update the package listing cache with the following command in the terminal (Ctrl + Alt + T):

# sudo apt-get update

2. Now we are going to install the AWS CLI using the command:

# sudo apt-get install awscli

3. We will can check if AWS CLI is working correctly with the following command:

# aws --version

Install Terraform on Ubuntu 18.04 / 20.04 LTS - Step by step process ?

This article covers how to install Terraform on Ubuntu. Terraform is an infrastructure automation tool which allows you to define and describe your infrastructure as code inside configuration files using a declarative language and to deploy and manage that infrastructure across a variety of public cloud providers like AWS, GCP, Azure, and so on.


To Install Terraform on Ubuntu:

1. First, create ~/bin directory:

$ mkdir ~/bin

2. Next, download the zip archive. Visit the Terraform download page for the latest version to download:

$ wget https://releases.hashicorp.com/terraform/0.12.24/terraform_0.12.24_linux_amd64.zip

3. Unzip the archive. 

The archive will extract a single binary called terraform.

$ unzip terraform_0.12.24_linux_amd64.zip

4. Move the terraform binary to a directory included in your system's PATH in our case that's ~/bin directory.

$ mv terraform ~/bin

5. To check whether Terraform is installed, run:

$ terraform version

Install Nginx on Ubuntu 20.04 - Step by Step process to implement it ?

This article covers how to install Nginx on the Ubuntu system. Also, you will learn how to configure the firewall and manage Nginx services. 

Finally, you will see how to uninstall Nginx in case you no longer need it in your system.

Nginx is a free, open-source Linux application for web servers. It works as a reverse proxy server by directing web traffic to specific servers.

Also, Nginx is used for security and load-balancing, but can also function independently as a web server.


To Install Nginx From Ubuntu Repositories:

1. Update Software Repositories

It is important to refresh the repository lists before installing new software. This helps make sure that the latest updates and patches are installed.

Open a terminal window and enter the following:

$ sudo apt-get update

2. Nginx is included in the Ubuntu 20.04 default repositories. Install it by entering the following command:

$ sudo apt-get install nginx


How to manage Nginx on Ubuntu ?

The behavior of Nginx can be adjusted. Use this to start or stop Nginx, or to enable or disable Nginx at boot.

Start by checking the status of the Nginx service:

$ sudo systemctl status nginx

If the status displays active (running), Nginx has already been started. 

Press CTRL+z to exit the status display.

If Nginx is not running, use the following command to launch the Nginx service:

$ sudo systemctl start nginx

To set Nginx to load when the system starts, enter the following:

$ sudo systemctl enable nginx

To stop the Nginx service, enter the following:

$ sudo systemctl stop nginx

To prevent Nginx from loading when the system boots:

$ sudo systemctl disable nginx

To reload the Nginx service (used to apply configuration changes):

$ sudo systemctl reload nginx

For a hard restart of Nginx:

$ sudo systemctl restart nginx

To Test the Configuration

$ sudo nginx –t

The system should report that the configuration file syntax is OK, and that the configuration file test is successful.

Install Wine on CentOS 8 - Step by Step process to do it ?

This article covers how to install Wine on CentOS 8. With the use of this package, you can easily use the native Windows applications on CentOS 8. However, you can also remove this package from your CentOS 8 system to conserve the memory whenever you want.


How to Install Wine 4 on CentOS 8:

Install EPEL Repos on CentOS 8

Wine is not included in the default CentOS 8 repositories but however available on EPEL repos. Therefore, run the command below to install EPEL repos:

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


To run Wine on CentOS 8:

Wine command takes the following syntax.

$ wine program [arguments]

To obtain help on Wine usage;

$ wine --help

Consult man pages for Wine for more insight.

$ man wine

Before you can use Wine to run Windows applications, reboot your system to setup the Wine environment.

$ systemctl reboot

Extend file system after resizing disk volume in Linux

This article will guide you on the different #command line options to extend #disk space storage in #Linux thereby allowing you to add #storage capacity to your #VM. If your filesystem has the resize capability, that capability is what you use. 1. Check if disk is available: #dmesg | grep sdb. 2. Check if disk is mounted: df -h | grep sdb. 3. Ensure there are no other partitions on disk: fdisk -l /dev/sdb. 4. Verify the #disk: fsck /dev/sdb. 5. Resize the #filesystem: resize2fs /dev/sdb.