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computing: software: operating systems: Linux: groupmod



groupmod - Modify a group


groupmod [ <-g gid [-o]> ] [ <-n group_name> ] group


The groupmod command modifies the system account files to reflect the changes that are specified on the command line. The options which apply to the groupmod command are

  • -g gid
    The numerical value of the group's ID. This value must be unique, unless the -o option is used. The value must be non-negative. Values between 0 and 99 are typically reserved for system groups. Any files which the old group ID is the file group ID must have the file group ID changed manually.
  • -n group_name
    The name of the group will be changed from group to group_name.


  • /etc/group - group information
  • /etc/gshadow - secure group information

See Also

chfn(1), chsh(1), passwd(1), groupadd(8), groupdel(8), useradd(8), userdel(8), usermod(8)


Julianne Frances Haugh (jockgrrlspam@spamix.netcomspam.spamcom)


  • This command is normally not on the search path for executables, so you may need to use whereis to find it.
  • This command usually requires root access.


  • /usr/sbin/groupmod -n newname oldname
    changes the name of the group; file-ownership and group membership are preserved, i.e. users and files belonging to oldname now belong to newname.

Edit Log

  • 2005-06-12 Transcribed from Ubuntu (hoary) manpages