man : sysctl.conf(5)
SYSCTL.CONF(5) OpenBSD Programmer's Manual SYSCTL.CONF(5)
sysctl.conf - sysctl variables to set at system startup
sysctl.conf contains a list of sysctl(8) variable assignments that is
read at system startup by rc(8) early on in the boot sequence.
The file is made up of sysctl(8) variable assignments (variable=value)
with comments designated by a hash mark (`#').
To turn on IP forwarding, one would use the following line:
To cause the kernel to reboot on a panic, instead of dropping into the
debugger, the following can be used:
A sysctl.conf file first appeared in OpenBSD 2.3.
OpenBSD 4.9 May 31, 2007 OpenBSD 4.9