groups(1)

     NAME
          groups - print the groups a user is in

     SYNOPSIS
          groups [username...]
          groups {--help,--version}

     DESCRIPTION
          This documentation is no longer being maintained and may be
          inaccurate or incomplete.  The Texinfo documentation is now
          the authoritative source.

          This manual page documents the GNU version of groups.
          groups prints the names of the supplementary groups that
          each given username, or the current process if none are
          given, is in.  If user names are given, the name of each
          user is printed before the list of that user's groups.

          The group lists are equivalent to the output of the command
          `id -Gn'.

        OPTIONS
          When GNU groups is invoked with exactly one argument, the
          following options are recognized:

          --help
               Print a usage message on standard output and exit
               successfully.

          --version
               Print version information on standard output then exit
               successfully.