1.\" $NetBSD: su.1,v 1.2 2011/12/25 22:27:55 christos Exp $ 2.\" 3.\"- 4.\" Copyright (c) 2011 Dag-Erling Smørgrav 5.\" All rights reserved. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions 9.\" are met: 10.\" 1. Redistributions of source code must retain the above copyright 11.\" notice, this list of conditions and the following disclaimer. 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in the 14.\" documentation and/or other materials provided with the distribution. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.\" Id: su.1 458 2011-11-02 13:10:25Z des 29.\" 30.Dd November 2, 2011 31.Dt SU 1 32.Os 33.Sh NAME 34.Nm su 35.Nd switch user identity 36.Sh SYNOPSYS 37.Nm 38.Op Ar login Op Ar ... 39.Sh DESCRIPTION 40The 41.Nm 42utility starts a shell under the identity of the user specified by the 43first argument on the command line. 44If no user is specified, the default is 45.Dq root . 46.Pp 47Any additional command-line arguments are passed as-is to the shell. 48.Pp 49The requesting user is authenticated using the 50.Dq su 51PAM policy. 52.Sh IMPLEMENTATION NOTES 53The 54.Nm 55utility is provided with the OpenPAM library as a sample application 56and should not be used in production systems. 57.Sh SEE ALSO 58.Xr openpam 3 59.Xr pam 3 60.Sh AUTHORS 61The 62.Nm 63utility and this manual page were written by 64.An Dag-Erling Sm\(/orgrav Aq des@FreeBSD.org . 65