On Mon, Jul 09, 2018 at 12:55:21AM +0000, Long Wind wrote: > -rw-r--r-- 1 root root 51 May 15 20:52 /etc/resolv.conf > > i can't remove file above, the story behind it:
You don't WANT to remove that file! If you do, you won't be able to use DNS. > dns servers are usually provided by isp > but they can't be used with vpn > so vpn provider told me to make a special resolv.conf > which contains dns servers not provided isp You probably want to look into the resolvconf package: https://packages.debian.org/stretch/resolvconf http://manpages.debian.org/resolvconf Essentially, you have two things that both want to manage your resolv.conf file for you: your DHCP client, and your VPN client. You'll have to work out how to make them coexist. The resolvconf package in Debian is one such way.