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SuSE 11.3 - man page for sg (suse section 1)

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newgrp(1)										newgrp(1)

NAME
       newgrp -  change effective group ID sg - execute command with different group ID

SYNOPSIS
       newgrp [-l] [group]
       sg group -c command

DESCRIPTION
       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
       gpasswd(1) command.

       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.

OPTIONS
       -l, --login
	      reinitialize the environment as if the user logged in.

       --help Print a help list.

       -u, --usage
	      Print a short usage message.

       -v, --version
	      Print program version.

SEE ALSO
       gpasswd(1), group(5), passwd(1), passwd(5), su(1)

AUTHOR
       Thorsten Kukuk <kukuk@suse.de>

pwdutils				    April 2004					newgrp(1)
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