NEWGRP(1) | General Commands Manual | NEWGRP(1) |
newgrp
— change to
a new primary group
newgrp |
[-l ] [group] |
The newgrp
command changes a user to a new
primary group (real and effective group ID) by starting a new shell. The
user remains logged in and the current directory and file creation mask
remain unchanged. The user is always given a new shell even if the primary
group change fails.
The newgrp
command accepts the following
options:
-l
The group is a group name or non-negative numeric group ID from the group database. The real and effective group IDs are set to group or the group ID associated with the group name.
If group is not specified,
newgrp
restores the user's real and effective group
IDs to the user's primary group specified in the password database. The
user's supplementary group IDs are restored to the set specified for the
user in the group database.
If the user is not a member of the specified group, and the group requires a password, the user will be prompted for the group password.
If a new shell is started the exit status is the exit status of the shell. Otherwise the exit status will be >0.
csh(1), groups(1), login(1), sh(1), su(1), umask(2), group(5), passwd(5), environ(7)
The newgrp
command conforms to
IEEE Std 1003.1-2001 (“POSIX.1”).
A newgrp
command appeared in
Version 6 AT&T UNIX. A
newgrp
command appeared in NetBSD
5.0.
There is no convenient way to enter a password into /etc/group. The use of group passwords is strongly discouraged since they are inherently insecure. It is not possible to stop users from obtaining the encrypted password from the group database.
June 6, 2007 | NetBSD 10.99 |