display group information
groupinfo utility displays the name, group ID (GID),
and members of the specified group.
The options are as follows:
- Do not display anything (quiet mode). This form of the command is useful
for scripts which need to check whether a particular group name or GID is
already in use on the system.
The group argument may be either a group
name or a GID.
groupinfo utility exits 0 if
group exists, and non-zero if it does not.
groupinfo utility first appeared in
groupinfo utility was written by
Alistair G. Crooks
If the specified group is the primary group of a user, but
that user is not listed as a member of the group in the
group(5) file, the
groupinfo utility fails to list that user as a member
of the group.