Re: [CentOS] resolv.conf rewritten every reboot. How to figure out who and why?

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.