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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.