NAME
    id - print real and effective UIDs and GIDs

SYNOPSIS
    id [OPTION]... [USERNAME]

DESCRIPTION
    Print information for USERNAME, or the current user.

    -a   ignore, for compatibility with other versions

    -g, --group
    print only the effective group ID

    -G, --groups
    print all group IDs

    -n, --name
    print a name instead of a number, for -ugG

    -r, --real
    print the real ID instead of the effective ID, with -ugG

    -u, --user
    print only the effective user ID

    --help display this help and exit

    --version
    output version information and exit

    Without any OPTION, print some useful set of identified information.

AUTHOR
    Written by Arnold Robbins and David MacKenzie.

REPORTING BUGS
    Report bugs to <bug-coreutils@gnu.org>.

COPYRIGHT
    Copyright (C) 2002 Free Software Foundation, Inc.
    This is free software; see the source for copying conditions. There is
    NO warranty; not even for MERCHANTABILITY or FITNESS FOR  A PARTICULAR
    PURPOSE.

SEE ALSO
    The full documentation  for id is maintained as a Texinfo manual. If
    the info and id programs are properly installed at your site, the com-
    mand

    info id

    should give you access to the complete manual.