Greg Wooledge on Fri, 2 Apr 2021 23:24:43 -0400 wrote:
"On Fri, Apr 02, 2021 at 10:48:09PM -0400, Dan Norton wrote:
> # cat /etc/resolv.conf
> domain attlocal.net
> search attlocal.net
> nameserver 1.1.1.1
> nameserver 1.0.0.1
> ...and this works very well. I like it because it cuts out more
> of google's monitoring of my browsing (I use Brave browser and
> DuckDuckGo).
>
> Now what about the first two lines? What purpose? Can I cut out AT&T
> also? ;)
man resolv.conf
search Search list for host-name lookup.
By default, the search list contains one entry, the local
domain name. It is determined from the local hostname
returned by gethostname(2); the local domain name is taken to
be everything after the first '.'. Finally, if the hostname
does not contain a '.', the root domain is assumed as the local
domain name.
[...]
The domain directive is an obsolete name for the search
direc‐ tive that handles one search list entry only.
Those lines do nothing, unless you routinely type commands like
"ssh lemon" or "ping pineapple" with no dots in the hostname. In that
case, assuming the hosts are not defined in /etc/hosts, the resolver
will try to look up "lemon.attlocal.net" or "pineapple.attlocal.net" or
whatever."
I see. Thanks for pointing that out.
"Remember that something will probably overwrite your changes to the
resolv.conf file, unless you take preemptive steps."
Isn't there a tidier way besides making resolv.conf immutable,
resulting in lots of /etc/resolv.conf.dhclient-new.* files? Maybe
stopping dhclient from overwriting resolv.conf[1]?
- Dan
[1]https://wiki.debian.org/resolv.conf#Modifying_.2Fetc.2Fdhcp.2Fdhclient.conf
