newgrp - Change group ID
sg - Execute command as different group ID
newgrp [-] [group]
sg [-] [group [[-c] command]]
newgrp is used to change the current group ID during a login session.
If the optional - flag is given, the user's environment will be reinitialized
as though the user had logged in, otherwise the current environment,
including current working directory, remains unchanged.
newgrp changes the current real group ID to the named group, or to the
default group listed in /etc/passwd if no group name is given. The
user will be prompted for a password if they do not have a password and
the group does, or if the user is not listed as a member and the group
has a password. The user will be denied access if the group password
is empty and the user is not listed as a member.
The sg command works similiar to newgrp but does not replace the user's
shell, so upon exit from a sg command, you are returned to your previous
group ID. sg also accepts a command. The command will be executed
with the Bourne shell and must be enclosed in quotes.
This version of newgrp has many compilation options, only some of which
may be in use at any particular site.
/etc/passwd - user account information
/etc/group - group information
login(1), id(1), su(1)
Julianne Frances Haugh (email@example.com)
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