Unknown option: "-1" Unix manual page for groups. (host=minya system=Darwin)
GROUPS(1)                 BSD General Commands Manual                GROUPS(1)

NAME
     groups -- show group memberships

SYNOPSIS
     groups [user]

DESCRIPTION
     The groups utility has been obsoleted by the id(1) utility, and is equiv-
     alent to ``id -Gn [user]''.  The command ``id -p'' is suggested for nor-
     mal interactive use.

     The groups utility displays the groups to which you (or the optionally
     specified user) belong.

EXIT STATUS
     The groups utility exits 0 on success, and >0 if an error occurs.

SEE ALSO
     id(1)

BSD                              June 6, 1993                              BSD