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Add User To Group in Linux

This article will guide you on how to add a #user to a #group in #Linux. The group permissions apply only to the group that has been assigned to the file or directory, they will not effect the actions of other users. The others permissions apply to all other users on the system, this is the permission group that you want to watch the most.

Groups can be thought of as levels of #privilege. A person who is part of a group can view or modify files belonging to that group, depending on the permissions of that file. User belonging to a group has privileges of that group, for example - sudo groups lets you run software as super user.

To view all groups present on the system simply open the /etc/group file. Each line in this file represents information for one group. Another option is to use the getent command which displays entries from #databases configured in /etc/nsswitch.

To Create a New Sudo User:

1. Log in to your server as the root user. #ssh root@server_ip_address.

2. Use the adduser command to add a new user to your system. Be sure to replace username with the user that you want to create.

3. Use the usermod command to add the user to the wheel group.

4. Test sudo access on new user account.

To List Users in Linux:

i. Get a List of All Users using the /etc/passwd File.

ii. Get a List of all Users using the getent Command.

iii. Check whether a user exists in the Linux system.

iv. System and Normal Users.

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