sg - execute command as different group ID

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

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

       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 a sg
       command you are returned to your previous group ID.

/etc/passwd
           User account information.

       /etc/shadow
           Secure user account information.

       /etc/group
           Group account information.

       /etc/gshadow
           Secure group account information.

       sg - execute command as different group ID

id(1), login(1), newgrp(1), su(1), gpasswd(1), group(5), gshadow(5).

shadow-utils 4.8.1                                 02/06/2024                                              SG(1)

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