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newgrp - change effective group ID sg - execute command with different group ID
newgrp [-l] [group]
sg group -c command
The newgrp command changes the user's real and effetive group ID by replacing the current
shell with a new shell. A new shell is launched even if an error occours.
A password is requested if the group has a password and the user is not listed in the
group file as being a member of that group. The password can be changed with the
If the new effective group ID is not in the supplementary group list, newgrp will add the
new group ID to the supplementary list, too.
With no operands and options, newgrp changes the user's group IDs (real and effective)
back to the group specified in password and group file.
The sg command works like the newgrp command, except that it executes the given command
with /bin/sh and upon exit the group ID of the current shell is not changed.
reinitialize the environment as if the user logged in.
--help Print a help list.
Print a short usage message.
Print program version.
gpasswd(1), group(5), passwd(1), passwd(5), su(1)
Thorsten Kukuk <email@example.com>
pwdutils April 2004 newgrp(1)
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