Could not resolve mirror.rackspace.com

Posted on by

capture-12

So a customer came to me with an issue about not being able to install chkrootkit, due to DNS failure. The customer wasn’t technical and didn’t understand how to fix it. It’s easy to fix, by wiping the resolv.conf nameservers file, and rebuilding it. Takes a few seconds, this should allow you to resolve domains afterwards again.


# Delete resolv.conf

rm /etc/resolv.conf

# Recreate the DNS file with different DNS servers
touch /etc/resolv.conf
echo "nameserver 4.2.2.4" >> /etc/resolv.conf
echo "nameserver 8.8.8.8" >> /etc/resolv.conf

Alternatively you could just open it up for editing with vi or nano.

vi /etc/resolv.conf
nano /etc/resolv.conf