Ubuntu Manpages

groups

print the groups a user is in

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

Print group memberships for each USERNAME or, if no USERNAME is specified, for the current process (which may differ if the groups database has changed).

display this help and exit
output version information and exit

Written by David MacKenzie and James Youngman.

Report groups bugs to bug-coreutils@gnu.org
GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
General help using GNU software: <http://www.gnu.org/gethelp/>
Report groups translation bugs to <http://translationproject.org/team/>

Copyright © 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.

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 coreutils 'groups invocation'

should give you access to the complete manual.