Linux: Find Out My Group Name [ Group Memberships ]

Posted on in Categories last updated January 21, 2011

How do I find out the group name under Linux operating systems using bash shell prompt? How do I display group information for the specified USERNAME under Linux?

Open a command-line terminal (select Applications > Accessories > Terminal), and then type the following command to list your group ownership i.e. display the groups a user is in:
$ users
Sample outputs:

vivek adm dialout cdrom plugdev lpadmin netdev admin sambashare libvirtd

vivek user is part of the above groups. To display group memberships for a user called tom, enter:
$ users userName
$ users tom

To print the primary group membership for a user called tom, enter:
$ id -g -n tom
To print the secondary group membership for a user called tom, enter:
$ id -G -n tom
You can also search /etc/group file as follows using the grep command:
$ grep Username /etc/group
$ grep vivek /etc/group

Sample outputs:

adm:x:4:vivek
dialout:x:20:vivek
cdrom:x:24:vivek
plugdev:x:46:vivek
lpadmin:x:105:vivek
netdev:x:112:vivek
admin:x:119:vivek
vivek:x:1000:
sambashare:x:122:vivek
libvirtd:x:125:vivek

See also:

If you need assistance with Linux groups membership related commands, turn to the man page first. It will give you detailed information, parameters and switches for the following commands:
$ man id
$ man groups
$ man 5 group

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+.

4 comment

  1. According to the users man page, the users command prints the user names of users currently logged in to the current host. The “groups” command will print the groups a user is in.

  2. This article is incorrect and needs to be updates. “users” will only display who’s logged in.

    Please make this correction because Cybercity is the top Google results for a lot of Linux-related searches.

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