sg(1)                            User Commands                           sg(1)

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       sg [-] group [[-c] command]

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       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.

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       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.

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       The following configuration variables in /etc/login.defs change the
       behavior of this tool:

       SYSLOG_SG_ENAB (boolean)
           Enable "syslog" logging of sg activity.

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       /etc/passwd
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       /etc/shadow
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       /etc/group
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       /etc/gshadow
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       id(1), login(1), newgrp(1), su(1), gpasswd(1), group(5), gshadow(5).

shadow-utils 4.19.4               06/12/2026                             sg(1)