Ubuntu linux domain name problem

Spent too long looking around for solutions to a

hostname: Unknown host

error today. The best answer is explained nicely at http://linux.dsplabs.com.au/hostname-unknown-host-bug-not-resolving-error-fix-p52/

Things work for me with /etc/hosts file in this format:


127.0.0.1 localhost
127.0.1.1 hostname.full.domain hostname

(I didn't comment out the localhost line.)