vishal@vishal:~$ cat /etc/resolv.conf
# Generated by NetworkManager
nameserver 192.168.1.1
nameserver 208.67.222.222
nameserver 208.67.220.220

vishal@vishal:~$ sudo /etc/init.d/networking restart
 * Running /etc/init.d/networking restart is deprecated because it may not enable again some interfaces
 * Reconfiguring network interfaces...                                   [ OK ]
vishal@vishal:~$