1.\" $OpenBSD: uname.1,v 1.19 2023/10/09 19:28:42 schwarze Exp $ 2.\" 3.\" Copyright (c) 1990 The Regents of the University of California. 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. Neither the name of the University nor the names of its contributors 15.\" may be used to endorse or promote products derived from this software 16.\" without specific prior written permission. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28.\" SUCH DAMAGE. 29.\" 30.\" from: @(#)du.1 6.13 (Berkeley) 6/20/91 31.\" 32.Dd $Mdocdate: October 9 2023 $ 33.Dt UNAME 1 34.Os 35.Sh NAME 36.Nm uname 37.Nd print operating system name 38.Sh SYNOPSIS 39.Nm uname 40.Op Fl amnprsv 41.Sh DESCRIPTION 42The 43.Nm uname 44utility writes strings representing one or more system characteristics 45to the standard output. 46The formats and meanings of all these strings vary among operating systems. 47.Pp 48The options are as follows: 49.Bl -tag -width Ds 50.It Fl a 51Behave as though all of the options 52.Fl mnrsv 53were specified. 54.It Fl m 55Print the name of the hardware type. 56On 57.Ox , 58this is the kernel architecture as returned by 59.Xr machine 1 . 60.It Fl n 61Print the network name of this machine. 62On 63.Ox , 64the same name can be printed with 65.Xr hostname 1 . 66.It Fl p 67Print the application architecture as returned by 68.Xr arch 1 69.Fl s . 70.It Fl r 71Print the operating system release. 72On 73.Ox , 74the format is 75.Sm off 76.Ar digit . digit Bq \- Ar flavor . 77.Sm on 78.Pp 79The meaning of the 80.Pf \- Ar flavor 81suffix is as follows: 82.Bl -tag -width "no suffix" 83.It \-beta 84A development version preceding the 85.Ar digit . Ns Ar digit 86release. 87.It no suffix 88A public release, 89or a development version very closely preceding that release. 90.It \-stable 91A branch based on the 92.Ar digit . Ns Ar digit 93release that only contains patches to fix very important bugs. 94.It \-current 95A development version coming after the 96.Ar digit . Ns Ar digit 97release. 98Some time before the subsequent release, the second 99.Ar digit 100is incremented and the 101.Pf \- Ar flavor 102switched to \-beta. 103.El 104.It Fl s 105Print the operating system name. 106On 107.Ox , 108this is always 109.Dq Ox . 110.It Fl v 111Print the operating system version. 112On 113.Ox , 114the format is 115.Ar SYSTEMNAME Ns # Ns Ar buildnumber 116with the 117.Ar SYSTEMNAME 118mentioned in 119.Xr config 8 . 120.El 121.Pp 122If no options are specified, 123.Nm uname 124prints the operating system name as if the 125.Fl s 126option had been specified. 127.Pp 128If 129.Fl a 130or more than one option is specified, 131.Ox 132prints the selected fields separated by single space characters 133in the following order: operating system name, network name, 134release, version, kernel architecture, application architecture. 135.Sh EXIT STATUS 136.Ex -std uname 137.Sh SEE ALSO 138.Xr hostname 1 , 139.Xr machine 1 , 140.Xr uname 3 141.Sh STANDARDS 142The 143.Nm 144utility is compliant with the 145.St -p1003.1-2008 146specification. 147.Pp 148The flag 149.Op Fl p 150is an extension to that specification. 151.Sh HISTORY 152The 153.Nm 154command first appeared in PWB/UNIX 1.0 155and was reimplemented for 156.Bx 4.4 . 157