Following jschueths's post Updating Crunchbang to the Next Release I decided to use SED to make everything easier, instead of making the changes one-by-one by hand.
We should probably make backups of the files we are modifying first:
$ sudo cp /etc/apt/sources.list /etc/apt/sources.list.waldrof
$ sudo cp /etc/apt/preferences /etc/apt/preferences.waldrofThen one command to make all the modifications:
$ sudo sed -i 's/waldorf/janice/g;s/wheezy/jessie/g' /etc/apt/sources.list /etc/apt/preferencesThen as jschurths said:
$ sudo apt-get update
$ sudo apt-get --no-install-recommends dist-upgrade