If you get this types of errors, telling you that a host could not be resolved, the problem is with your /etc/resolv.conf file.
'[Could not resolve host: ... No address associated with hostname]'
The easiest solution for this is to edit your /etc/resolv.conf file (with sudo or as root) and replace the nameserver lines with the following lines, which set the Google DNS servers:
nameserver 8.8.8.8
nameserver 8.8.4.4
Save the file, restart the network and you’re done:
$ sudo /etc/init.d/networking restart