Modern domain name resolution on Linux

In this section, we're going to look at domain name resolution, and specifically the software installed on a typical CentOS box that enables the lookup of addresses when presented with a domain.

We'll look at /etc/resolv.conf and domain name resolution methods on current generation Linux systems (such as network manager). We're going to test the connection to our DNS server, and run DNS queries to see if it's working.

This section assumes a basic understanding of domain names and IP addresses.

Getting ready

Connect to centos1 and check that your domain resolution is already working by pinging an address.

I'm in the UK, so I default to using the BBC for my tests...