1.\" Copyright (c) 2007 Daniel Gerzo <danger@FreeBSD.org> 2.\" 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.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.\" $FreeBSD$ 26.Dd October 12, 2020 27.Dt BOOT.CONFIG 5 28.Os 29.Sh NAME 30.Nm boot.config 31.Nd "Configuration file for the boot blocks" 32.Sh DESCRIPTION 33The 34.Nm 35file contains options for the 36.Fx 37boot block code. 38.Pp 39When the 40.Fx 41boot loader runs, it searches the 42.Dq Li a 43slice of the boot partition for a 44.Nm 45file (as a result, slices which are missing an 46.Dq Li a 47partition require user intervention during the boot process). 48If the 49.Nm 50file is found, its contents are used as the default configuration 51options for the boot block code and are echoed to the system console. 52.Pp 53A valid format of this file is to put BIOS drive number, a controller 54type, a unit number, a partition, a kernel file name, and any other 55valid 56.Xr boot 8 57option on a single line, as it is done at the 58.Dq Li "boot:" 59prompt. 60.Pp 61The options related to the boot image selection described below and all 62the other options available for 63.Nm 64are documented in detail in the 65.Xr boot 8 66manual page. 67.Sh FILES 68.Bl -tag -width /boot.config -compact 69.It Pa /boot.config 70parameters for the boot blocks (optional) 71.It Pa /boot/config 72alternate location for boot config information 73.El 74.Sh EXAMPLES 75The command: 76.Bd -literal -offset indent 77# echo "-P" > /boot.config 78.Ed 79.Pp 80will activate the serial console of 81.Fx 82if no keyboard is present, otherwise video console will be used. 83.Pp 84The command: 85.Bd -literal -offset indent 86# echo "1:ad(1,a)/boot/loader" > /boot.config 87.Ed 88.Pp 89will instruct the second stage of 90.Xr boot 8 91on the first disk to boot with the third 92.Xr boot 8 93stage from the second disk. 94.Pp 95The command: 96.Bd -literal -offset indent 97# echo "1:ad(1,a)/boot/loader -P" > /boot.config 98.Ed 99.Pp 100will do both of the above. 101.Sh SEE ALSO 102.Xr boot 8 , 103.Xr loader 8 104.Sh AUTHORS 105This manual page was written by 106.An Daniel Gerzo Aq Mt danger@FreeBSD.org . 107