Differential D16375 Diff 45665 head/share/man/man5/sysctl.conf.5

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	.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)			.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT			.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY			.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF			.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	.\" SUCH DAMAGE.			.\" SUCH DAMAGE.
	.\"			.\"
	.\" $FreeBSD$			.\" $FreeBSD$
	.\"			.\"
	.Dd December 30, 1999			.Dd July 21, 2018
	.Dt SYSCTL.CONF 5			.Dt SYSCTL.CONF 5
	.Os			.Os
	.Sh NAME			.Sh NAME
	.Nm sysctl.conf			.Nm sysctl.conf
	.Nd kernel state defaults			.Nd kernel state defaults
	.Sh DESCRIPTION			.Sh DESCRIPTION
	The			The
	.Pa /etc/sysctl.conf			.Pa /etc/sysctl.conf
	file is read in when the system goes into multi-user mode to set default			file is read in when the system goes into multi-user mode to set default
	settings for the kernel.			settings for the kernel.
	The			The
	.Pa /etc/sysctl.conf			.Pa /etc/sysctl.conf
	is in the format of the			file is in the format of the
	.Xr sysctl 8			.Xr sysctl 8
	command, i.e.\&			command, i.e.,
	.Bd -literal -offset indent			.Bd -literal -offset indent
	sysctl_mib=value			sysctl_mib=value
	.Ed			.Ed
	.Pp			.Pp
	Comments are denoted by a			Comments are denoted by a
	.Dq #			.Dq #
	at the beginning of a line.			at the beginning of a line.
	Comments can also exist at the end of a line,			Comments can also exist at the end of a line,
	as seen in the			as seen in the
	.Sx EXAMPLES			.Sx EXAMPLES
	section, below.			section, below.
	.Sh FILES			.Sh FILES
	.Bl -tag -width /etc/sysctl.conf -compact			.Bl -tag -width /etc/sysctl.conf -compact
	.It Pa /etc/sysctl.conf			.It Pa /etc/sysctl.conf
	Initial settings for			Initial settings for
	.Xr sysctl 8 .			.Xr sysctl 8 .
	.El			.El
	.Sh EXAMPLES			.Sh EXAMPLES
	To turn off logging of programs that exit due to fatal signals you may use			To turn off logging of programs that exit due to fatal signals you may use
	a configuration like			a configuration like
	.Bd -literal -offset indent			.Bd -literal -offset indent
	# Configure logging.			# Configure logging.
	kern.logsigexit=0 # Do not log fatal signal exits (e.g. sig 11)			kern.logsigexit=0 # Do not log fatal signal exits (e.g., sig 11)
	.Ed			.Ed
	.Sh SEE ALSO			.Sh SEE ALSO
	.Xr rc.conf 5 ,			.Xr rc.conf 5 ,
	.Xr rc 8 ,			.Xr rc 8 ,
	.Xr sysctl 8			.Xr sysctl 8
	.Sh HISTORY			.Sh HISTORY
	The			The
	.Nm			.Nm
	file appeared in			file appeared in
	.Fx 4.0 .			.Fx 4.0 .
	.Sh BUGS			.Sh BUGS
	If loadable kernel modules are used to introduce additional kernel			If loadable kernel modules are used to introduce additional kernel
	functionality and sysctls to manage that functionality,			functionality and sysctls to manage that functionality,
	.Nm			.Nm
	may be processed too early in the boot process to set those sysctls.			may be processed too early in the boot process to set those sysctls.
	For example, sysctls to manage the linux emulator cannot be set in			For example, sysctls to manage the Linux compatibility layer
				.Po
				.Xr linux 4
				.Pc
				cannot be set in
	.Nm			.Nm
	if the linux emulator is loaded as a module rather than			if the Linux compatibility layer is loaded as a module rather than
	compiled into the kernel.			compiled into the kernel.