1.\"- 2.\" Copyright (c) 2011 Dag-Erling Smørgrav 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 3. The name of the author may not be used to endorse or promote 14.\" products derived from this software without specific prior written 15.\" permission. 16.\" 17.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27.\" SUCH DAMAGE. 28.\" 29.\" $Id: su.1 816 2014-09-12 07:50:22Z des $ 30.\" 31.Dd September 12, 2014 32.Dt SU 1 33.Os 34.Sh NAME 35.Nm su 36.Nd switch user identity 37.Sh SYNOPSIS 38.Nm 39.Op Ar login Op Ar ... 40.Sh DESCRIPTION 41The 42.Nm 43utility starts a shell under the identity of the user specified by the 44first argument on the command line. 45If no user is specified, the default is 46.Dq root . 47.Pp 48Any additional command-line arguments are passed as-is to the shell. 49.Pp 50The requesting user is authenticated using the 51.Dq su 52PAM policy. 53.Sh IMPLEMENTATION NOTES 54The 55.Nm 56utility is provided with the OpenPAM library as a sample application 57and should not be used in production systems. 58.Sh SEE ALSO 59.Xr openpam 3 , 60.Xr pam 3 61.Sh AUTHORS 62The 63.Nm 64utility and this manual page were written by 65.An Dag-Erling Sm\(/orgrav Aq des@des.no . 66