Suddenly can't get nameserver resolution on FC21 after ...

[Gordon Messmer]

On 01/28/2015 07:02 AM, William W. Austin wrote:
> I have checked my ifcfg-* files under/etc/sysconfig/  (all 3 links of
> each of the 2 nics) and they are unchanged. My /etc/hosts file is
> unchanged

DNS is configured in /etc/resolv.conf.  Look there.

Attempt to ping your DNS servers to verify they are reachable.

Use "dig" to query them directly:
  dig @<dns IP address> <hostname>