Updating Ubuntu's sources.list

Frustratingly, I keep on forgetting to:

sudo bash

cd /etc/apt

cp sources.list sources.list-`date +%Y%m%d`

sed -i 's#au.archive.ubuntu.com/ubuntu#mirror.internode.on.net/pub/ubuntu/ubuntu#g' sources.list

This really needs to be a post-install hook or something.