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April, 26th. 2006:
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SG
Section: User Commands (1) Updated: 02/01/2026 Index
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NAME
sg - execute command as different group ID
SYNOPSIS
-
sg [-] group [[-c] command]
DESCRIPTION
The
sg
command works similar to
newgrp
but accepts a command. The command will be executed with the
/bin/sh
shell. With most shells you may run
sg
from, you need to enclose multi-word commands in quotes. Another difference between
newgrp
and
sg
is that some shells treat
newgrp
specially, replacing themselves with a new instance of a shell that
newgrp
creates. This doesn't happen with
sg, so upon exit from an
sg
command you are returned to your previous group ID.
OPTIONS
The options which apply to the
sg
command are:
-, -l
-
Start the shell as a login shell.
-c
-
Specify a command that will be invoked by the shell using its
-c.
This is the default; for backward compatibility.
CONFIGURATION
The following configuration variables in
/etc/login.defs
change the behavior of this tool:
SYSLOG_SG_ENAB (boolean)
-
Enable "syslog" logging of
sg
activity.
FILES
/etc/passwd
-
User account information.
/etc/shadow
-
Secure user account information.
/etc/group
-
Group account information.
/etc/gshadow
-
Secure group account information.
SEE ALSO
id(1),
login(1),
newgrp(1),
su(1),
gpasswd(1),
group(5), gshadow(5).
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- OPTIONS
-
- CONFIGURATION
-
- FILES
-
- SEE ALSO
-
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