SYSCTL.CONF(5) BSD Reference 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 ('#').
/etc/sysctl.conf
To turn on IP forwarding, one would use the following line: net.inet.ip.forwarding=1 To cause the kernel to reboot on a panic, instead of dropping into the debugger, the following can be used: ddb.panic=0
rc(8), sysctl(8)
A sysctl.conf file first appeared in OpenBSD 2.3. MirBSD #10-current June 25, 1998 1