.\" $OpenBSD: sysctl.conf.5,v 1.6 2000/02/29 04:48:39 aaron Exp $
.\"
.\" Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
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.Dd June 25, 1998
.Dt SYSCTL.CONF 5
.Os
.Sh NAME
.Nm sysctl.conf
.Nd sysctl variables to set at system startup
.Sh DESCRIPTION
.Nm
contains a list of
.Xr sysctl 8
variable assignments that is read at system startup by
.Xr rc 8
early on in the boot sequence.
.Pp
The file is made up of
.Xr sysctl 8
variable assignments
.Pq Ar variable Ns No = Ns Ar value
with comments designated by a hash mark
.Pq Sq # .
.Sh EXAMPLES
To turn on IP forwarding, one would use the following line:
.Bd -literal -offset indent
net.inet.ip.forwarding=1
.Ed
.Pp
To cause the kernel to reboot on a panic, instead of dropping into
the debugger, the following can be used:
.Bd -literal -offset indent
ddb.panic=0
.Ed
.Sh FILES
.Bl -tag -width /etc/sysctl.conf -compact
.It Pa /etc/sysctl.conf
.El
.Sh SEE ALSO
.Xr rc 8 ,
.Xr sysctl 8
.Sh HISTORY
A
.Nm
file first appeared in
.Ox 2.3 .