xref: /freebsd/share/man/man5/sysctl.conf.5 (revision a220d00e74dd245b4fca59c5eca0c53963686325)
1.\" Copyright (c) 1999 Chris Costello <chris@FreeBSD.org>
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25.\" $FreeBSD$
26.\"
27.Dd December 30, 1999
28.Dt SYSCTL.CONF 5
29.Os
30.Sh NAME
31.Nm sysctl.conf
32.Nd kernel state defaults
33.Sh DESCRIPTION
34The
35.Pa /etc/sysctl.conf
36file is read in when the system goes into multi-user mode to set default
37settings for the kernel.  The
38.Pa /etc/sysctl.conf
39is in the format of the
40.Xr sysctl 8
41command, i.e.\&
42.Bd -literal -offset indent
43sysctl_mib=value
44.Ed
45.Pp
46Comments are denoted by a
47.Dq #
48at the beginning of a line.  Comments can also exist at the end of a line,
49as seen in the
50.Sx EXAMPLES
51section, below.
52.Sh FILES
53.Bl -tag -width /etc/sysctl.conf -compact
54.It Pa /etc/sysctl.conf
55Initial settings for
56.Xr sysctl 8 .
57.El
58.Sh EXAMPLES
59To turn off logging of programs that exit due to fatal signals, as well as
60telling Linux programs that you are running
61.Fx 3.4 Ns -STABLE ,
62you may use
63a configuration like
64.Bd -literal -offset indent
65# Configure logging and Linux execution.
66kern.logsigexit=0	# Do not log fatal signal exits (e.g. sig 11)
67compat.linux.osname=FreeBSD
68compat.linux.osrelease=3.4-STABLE
69.Ed
70.Sh SEE ALSO
71.Xr rc.conf 5 ,
72.Xr rc 8 ,
73.Xr sysctl 8
74.Sh HISTORY
75The
76.Nm
77file appeared in
78.Fx 4.0 .
79