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:

$ ping bbc.co.uk
PING bbc.co.uk (151.101.0.81) 56(84) bytes of data.
64 bytes from 151.101.0.81 (151.101.0.81): icmp_seq=1 ttl=63 time=30.4 ms

If yours isn't working for whatever reason, destroy and recreate your VMs.

Once you're sure you can ping a domain, install dig (and the myriad of other tools that come along with this package):

$ sudo yum install -y bind-utils