cleanup unused -dev packages with autoremove
|Reported by:||hamish||Owned by:|
at the end of setdown.sh we should try apt-get autoremove without the --yes flag. This may uninstall a lot more than we intend- any packages which are self-compiled must manually install any libraries they need if they want them to hand around.
Some installers (e.g. pgRouting) are naughty and don't clean up their -dev packages after themselves, leading to a couple of hundred extra MB on the final disc. autoremove would catch those.