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Add User to Group in Ubuntu Linux - Step by Step Process ?

This article covers how to add a user to a group on Ubuntu Linux System. If you want to learn about adding or removing a user on Linux OS, you can follow our guide on How to Add and Remove Users on Linux .

User accounts can be assigned to one or more groups on Linux. You can configure file permissions and other privileges by group. For example, on Ubuntu, only users in the sudo group can use the sudo command to gain elevated permissions.


To Add a New Group on Ubuntu Linux:

If you want to create a new group on your system, use the groupadd command following command, replacing new_group with the name of the group you want to create:

$ sudo groupadd mynewgroup


To Add an Existing User Account to a Group:

To add an existing user account to a group on your system, use the usermod command, replacing examplegroup with the name of the group you want to add the user to andexampleusername  with the name of the user you want to add:

$ usermod -a -G examplegroup exampleusername


Listing Users in Linux - How to do it ?

This article will guide you on the different methods to list down all the Linux system users. To know whether a particular user is having sudo access or not, we can use -l and -U options together. For example, If the user has sudo access, it will print the level of #sudo access for that particular user. 

If the user don't have sudo access, it will print that user is not allowed to run sudo on localhost.

To change users in #Linux:

The su command lets you switch the current user to any other user. 

If you need to run a command as a different (non-root) user, use the –l [username] option to specify the user account. 

Additionally, su can also be used to change to a different shell interpreter on the fly.