1.\" $OpenBSD: dmesg.8,v 1.9 2000/05/01 09:45:59 hugh Exp $ 2.\" $NetBSD: dmesg.8,v 1.9 1995/03/18 14:54:47 cgd Exp $ 3.\" 4.\" Copyright (c) 1980, 1991, 1993 5.\" The Regents of the University of California. 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.\" 3. All advertising materials mentioning features or use of this software 16.\" must display the following acknowledgement: 17.\" This product includes software developed by the University of 18.\" California, Berkeley and its contributors. 19.\" 4. Neither the name of the University nor the names of its contributors 20.\" may be used to endorse or promote products derived from this software 21.\" without specific prior written permission. 22.\" 23.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33.\" SUCH DAMAGE. 34.\" 35.\" @(#)dmesg.8 8.1 (Berkeley) 6/5/93 36.\" 37.Dd June 5, 1993 38.Dt DMESG 8 39.Os 40.Sh NAME 41.Nm dmesg 42.Nd "display the system message buffer" 43.Sh SYNOPSIS 44.Nm dmesg 45.Op Fl M Ar core 46.Op Fl N Ar system 47.Sh DESCRIPTION 48.Nm 49displays the contents of the system message buffer. 50It is most commonly used to review system startup messages. 51.Pp 52The options are as follows: 53.Bl -tag -width Ds 54.It Fl M Ar core 55Extract values associated with the name list from the specified 56.Ar core 57instead of the default 58.Pa /dev/kmem . 59.It Fl N Ar system 60Extract the name list from the specified 61.Ar system 62instead of the default 63.Pa /bsd . 64.El 65.Sh FILES 66.Bl -tag -width /var/run/dmesg.boot -compact 67.It Pa /var/run/dmesg.boot 68copy of dmesg created at boot 69.El 70.Sh SEE ALSO 71.Xr syslogd 8 72.Sh HISTORY 73The 74.Nm 75command appeared in 76.Bx 4.0 . 77