This post was originally published on go2linux.org, a Linux blog I ran from 2007 to 2011. The domain is no longer mine, but I am the original author. I am republishing it here on garron.me with corrections and improvements.
If you work with Ubuntu, Debian or Fedora, as soon as you have your default installation, you will probable have nslookup utility installed, but, if you are like me, working on Arch Linux, you will have to install it.
Just enter this.
sudo pacman -S dnsutils
And you will nslookup and other dns utilities ready to run