Add static DNS in Ubuntu server 12.04 LTS


Ubuntu 12.04 use resolvconf(a set of scripts and hooks) instead of resolv.conf to manage DNS server. The most notable difference for the user is that any change manually done to /etc/resolv.conf will be lost as it gets overwritten next time something triggers resolvconf.
To add the static dns entries in resolv.conf file,edit /etc/resolvconf/resolv.conf.d/base:
sudo nano /etc/resolvconf/resolv.conf.d/base
Add these lines (the example below is OpenDNS’s public name servers):
nameserver 203.67.222.222
nameserver 203.67.220.220

Run this command to refresh the resolvconf setting:
sudo service resolvconf restart

To view your DNS Servers addresses, use this command:
cat /etc/resolv.conf


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