Ubuntu Linux: Find Groups A User Belongs To

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How do I find out in which groups Ubuntu Linux users belong to? How do I find out Ubuntu Linux group membership for a particular user named tom?

You can use any one of the following command to list a groups a user belongs to:

a) id command – Display real and effective user and group IDs.

b) groups command – Display the groups a user is in on Ubuntu Linux.

Ubuntu: See which groups your Linux user belongs to

Open the Terminal app or login to the remote server over the ssh based session. Type the following id command
$ id -Gn

To display the groups a user named ‘tom’ is in on Ubuntu Linux, enter:
$ id -Gn tom

You can also use deprecated groups command as follows:
$ groups
$ groups tom

Sample outputs:

Fig. 01: groups and id command on Ubuntu
Fig. 01: groups and id command on Ubuntu

See also

Posted by: Vivek Gite

The author is the creator of nixCraft and a seasoned sysadmin and a trainer for the Linux operating system/Unix shell scripting. He has worked with global clients and in various industries, including IT, education, defense and space research, and the nonprofit sector. Follow him on Twitter, Facebook, Google+.

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