ultrix man page for groups

groups(1)						      General Commands Manual							 groups(1)

Name
       groups - show group memberships

Syntax
       groups [user]

Description
       The command shows the groups to which the specified user belongs determined by reading These are the groups that will be in effect the next
       time the usr logs in.  If the command is used without the usr argument, it will report the groups currently  in	effect	using  the  system
       call. If the file was changed after the login, this may not be the same.

       Each  user belongs to a group specified in the password file and possibly to other groups as specified in the file If you do not own a file
       but you do belong to the group by which it is owned, you are granted group access to the file.

       When a new file is created it is given the group specifications of the directory in which it resides.

Files
See Also
       setgroups(2)

																	 groups(1)