.\"-
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.Dd June 27, 2023
.Dt SU 1
.Os
.Sh NAME
.Nm su
.Nd switch user identity
.Sh SYNOPSIS
.Nm
.Op Ar login Op Ar ...
.Sh DESCRIPTION
The
.Nm
utility starts a shell under the identity of the user specified by the
first argument on the command line.
If no user is specified, the default is
.Dq root .
.Pp
Any additional command-line arguments are passed as-is to the shell.
.Pp
The requesting user is authenticated using the
.Dq su
PAM policy.
.Sh IMPLEMENTATION NOTES
The
.Nm
utility is provided with the OpenPAM library as a sample application
and should not be used in production systems.
.Sh SEE ALSO
.Xr openpam 3 ,
.Xr pam 3
.Sh AUTHORS
The
.Nm
utility and this manual page were written by
.An Dag-Erling Sm\(/orgrav Aq Mt des@des.no .