ddclient WARNING:unable to determine IP address

Posted under » Linux on 27 May 2012

ddclient is a convenient way to update your dynamic IP machine to DNS servers like dyndns or namecheap.

Installing it is easy but when I ran the diagnostic,

ddclient -daemon=0 -debug -verbose -noquiet

I got an error

ddclient WARNING:unable to determine IP address

While some DNS service has its own way of determining your IP, some don't. In order to do this on your own, go to config,

gedit /etc/ddclient.conf
or 
gedit /etc/default/ddclient

Then add

use=if, if=eth0

I know this is simple as it is in the manual but on my first use, I encountered this problem.