>Just one of those things you kind of pick up as you go along and >remember. Tribal knowledge if you will. There's two pdf's and one command I use "often" :) The redhat 5.3 deployment and installation pdf's (or the online versions) and: # find /usr/share/doc/ -exec grep "PEERDNS" '{}' \; -print PEERDNS=yes|no file if PEERDNS is not set to "no". /usr/share/doc/initscripts-8.45.25/sysconfig.txt honor PEERDNS=no for pump and dhcpcd too (#18619) DEFROUTE defaults on; PEERDNS documented and defaults on /usr/share/doc/initscripts-8.45.25/ChangeLog Now you know what doc to read... Also: man -K PEERDNS But that's generally a slow and last ditch effort even after google:) It also never helped with this string but its useful to know.