Ubuntu DNS Lookup Failure
Your /etc/resolv.conf
should look like this:
### OPENDNS ###
nameserver 208.67.222.222
nameserver 208.67.220.220
### GOOGLE NS ###
#nameserver 8.8.8.8
#nameserver 8.8.4.4
Without the nameserver
keyword, the IP addresses on their own don't mean anything.