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NEWGRP(1)                 BSD General Commands Manual                NEWGRP(1)

     newgrp -- change to a new group

     newgrp [-l] [group]

     The newgrp utility creates a new shell execution environment with modified real and effective group

     The options are as follows:

     -l      Simulate a full login.  The environment and umask are set to what would be expected if the user
             actually logged in again.

     If the group operand is present, a new shell is started with the specified effective and real group
     IDs.  The user will be prompted for a password if they are not a member of the specified group.

     Otherwise, the real, effective and supplementary group IDs are restored to those from the current
     user's password database entry.

     The newgrp utility attempts to start the shell regardless of whether group IDs were successfully

     If an error occurs and the shell cannot be started, newgrp exits >0.  Otherwise, the exit status of
     newgrp is the exit status of the shell.

     csh(1), groups(1), login(1), sh(1), su(1), umask(1), group(5), passwd(5), environ(7)

     The newgrp utility conforms to IEEE Std 1003.1-2001 (``POSIX.1'').

     A newgrp utility appeared in Version 6 AT&T UNIX.

     Group passwords are inherently insecure as there is no way to stop users obtaining the crypted pass-words passwords
     words from the group database.  Their use is discouraged.

BSD                              May 23, 2002                              BSD

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