id(1M)
NAME
id − print the user name, user ID, group name and group ID
SYNOPSIS
/usr/bin/id [ −a ]
DESCRIPTION
id displays your user ID, user name, group ID and group name. If your real ID and your effective IDs do not match, both are printed.
OPTIONS
−a Reports user name, user ID and all the groups to which the user belongs.
SEE ALSO
SunOS 5.2 — Last change: 5 Jul 1990