Reference the rcctl(8) utility in rc.conf.8 (which discusses rc.conf.local).
Rob Index: rc.conf.8 =================================================================== RCS file: /cvs/src/share/man/man8/rc.conf.8,v retrieving revision 1.26 diff -u -p -r1.26 rc.conf.8 --- rc.conf.8 4 May 2015 22:29:04 -0000 1.26 +++ rc.conf.8 18 Sep 2015 19:06:50 -0000 @@ -50,7 +50,9 @@ It is advisable to leave .Nm rc.conf untouched, and instead create and edit a new .Nm rc.conf.local -file. +file or use the +.Xr rcctl 8 +utility. Since only the last assignment to any variable takes effect, variables set in this file override variables previously set in .Nm rc.conf . @@ -219,7 +221,8 @@ amd_master=/etc/amd/master # AMD 'master .Xr init 8 , .Xr intro 8 , .Xr rc 8 , -.Xr rc.d 8 +.Xr rc.d 8 , +.Xr rcctl 8 .Sh HISTORY The .Nm