I have Xubuntu 14.04 installed on my server. network-manager is not installed. It seems to have lost its ability to resolve domains, and I'm not sure where to begin diagnosing the issue.ping 8.8.8.8 pings normally.ping google.com returns ping: unknown host google.com.I tried adding a DNS server to /etc/network/interfaces/. Now it contains:# interfaces(5) file used by ifup(8) and ifdown(8)auto loiface lo inet loopbackauto eth0iface eth0 inet staticaddress 192.168.0.100gateway 192.168.0.1netmask 255.255.255.0dns-nameservers 8.8.8.8 8.8.4.4This didn't fix the problem, so I tried running:hesse@galois:~$ sudo service networking restartstop: Job failed while stoppingstart: Job is already running: networkingI tried stop then start and reload but they didn't seem to do anything.How do I diagnose the problem?Note: It is a lot of work for me to restart the machine (I need to connect a keyboard and monitor to it), so please suggest solutions that don't require restarting if possible./etc/resolv.conf:# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)#     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
I can ping IPs but can't resolve domains
ubuntu;dns