Il 20/09/2016 22:11, Uwe Brauer ha scritto:
> Even as root I cannot anymore modify nor delete it, I wanted to set
> again the link mentioned above but without success.

If you change attribute like this:
chattr +i /etc/resolv.conf
your file is unchangeable.

chattr -i /etc/resolv.conf
solve your problem.

Rodolfo