On Thu, Aug 01, 2019 at 08:16:38PM +0200, Pascal Hambourg wrote: > Le 01/08/2019 à 19:58, Pascal Hambourg a écrit : > > Le 01/08/2019 à 18:18, David Wright a écrit : > > > > > > I think that a lot of people install resolvconf (deliberately or > > > incidentally) without really understanding what it's for or what > > > it does. Then, because most people naturally check the contents of > > > /etc/resolv.conf, they indulge in all sorts of cargo-cult behaviour > > > to pummel it into submission; the most extreme I've seen being > > > editing followed by chattr +i. > > > > AFAIK it is also the most inefficient : upon installation, resolvconf > > replaces the regular file /etc/resolv.conf with a symlink pointing to a > > volatile temporary file in /run (tmpfs), so the immutable attribute has > > no effect if set on the symlink and will be reset at the next boot if > > set on the target file in /run. > > Thinking twice and testing, it appears that you cannot even set file > attributes in tmpfs nor on a symlink.
(which is why the wiki's first step in the immutable section is to remove the existing /etc/resolv.conf file with rm -f) (I swear to glob I'm going to lose it if people continue ignoring the wiki)