Prevent system management from installing over a test package on Ubuntu

When you are testing a new package version it's annoying to have your system management come and install the old version over the top of your test one. There's a bunch of ways to stop this, the one I tend to use on Ubuntu is:

echo "package hold" | sudo dpkg --set-selections

To undo the hold and go back to normal:

echo "package install" | sudo dpkg --set-selections