Apt-get error in debian

If you get the following error during apt-get commands
apt-get update

rr http://gb.archive.ubuntu.com natty-backports Release.gpg
  Temporary failure resolving ‘gb.archive.ubuntu.com’

Then there is a name server issue.The source list is not correctly resolving.So you have to check the DNS settings or name server settings in /etc/resolv.conf

So open /etc/resolv.conf in your editor and add nameserver 

nameserver 8.8.8.8

Then use the command apt-get

This would probably resolv the issue.