Linux: Find Out My Group Name [ Group Memberships ]

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:

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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

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4 comments… add one
  • mary poppins Jan 31, 2011 @ 9:46

    $ grep vivek /etc/group
    ->
    $ getent group vivek

    $ grep vivek /etc/passwd
    ->
    $ getent passwd vivek

  • john Jan 30, 2013 @ 16:38

    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.

  • Dan Dascalescu Jun 30, 2014 @ 20:48

    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.

  • sajsaj Apr 1, 2016 @ 14:41

    cat /etc/group
    will list all group you have

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