1.\" Copyright (c) 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)uname.1 8.3 (Berkeley) 4/8/94 33.\" $FreeBSD$ 34.\" 35.Dd January 14, 2002 36.Dt UNAME 1 37.Os 38.Sh NAME 39.Nm uname 40.Nd display information about the system 41.Sh SYNOPSIS 42.Nm 43.Op Fl amnprsv 44.Sh DESCRIPTION 45The 46.Nm 47command writes the name of the operating system implementation to 48standard output. 49When options are specified, strings representing one or more system 50characteristics are written to standard output. 51.Pp 52The options are as follows: 53.Bl -tag -width indent 54.It Fl a 55Behave as though the options 56.Fl m , n , r , s , 57and 58.Fl v 59were specified. 60.It Fl m 61Write the type of the current hardware platform to standard output. 62.It Fl n 63Write the name of the system to standard output. 64.It Fl p 65Write the type of the machine processor architecture to standard output. 66.It Fl r 67Write the current release level of the operating system 68to standard output. 69.It Fl s 70Write the name of the operating system implementation to standard output. 71.It Fl v 72Write the version level of this release of the operating system 73to standard output. 74.El 75.Pp 76If the 77.Fl a 78flag is specified, or multiple flags are specified, all 79output is written on a single line, separated by spaces. 80.Sh DIAGNOSTICS 81.Ex -std 82.Sh SEE ALSO 83.Xr sysctl 3 , 84.Xr uname 3 , 85.Xr sysctl 8 86.Sh HISTORY 87The 88.Nm 89command appeared in 90.Bx 4.4 . 91.Sh STANDARDS 92The 93.Nm 94command is expected to conform to the 95.St -p1003.2 96specification. 97