Re: Changing nameservers - WAS "Which resolv.conf file?"
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)
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