NAME 

groups - print the groups a user is in

SYNOPSIS 

groups [OPTION]... [USERNAME]...

DESCRIPTION 

--help
display this help and exit
--version
output version information and exit

Same as id -Gn. If no USERNAME, use current process.

AUTHOR 

Written by David MacKenzie.

REPORTING BUGS 

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

COPYRIGHT 

Copyright © 2004 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 groups is maintained as a Texinfo manual. If the info and groups programs are properly installed at your site, the command
info groups

should give you access to the complete manual.