To uninstall xcowsay just follow these instructions.
sudo apt-get remove xcowsay
This will remove just the xcowsay package itself.
sudo apt-get remove --auto-remove xcowsay
This will remove the xcowsay package and any other dependant packages which are no longer needed.
If you also want to delete your local/config files for xcowsay then this will work.
sudo apt-get purge xcowsay
Or similarly, like this xcowsay
sudo apt-get purge --auto-remove xcowsay
|Maintainer||Samuel Henrique <email@example.com>|
|Home page||http://www.doof.me.uk/xcowsay/ uitoolkit::gtk, use::entertaining|
|Description||Graphical configurable talking cow pop-up cow on your desktop with a speech bubble and some customizable text. There's also a dream mode where the cow can display images. It comes with a fortune(6) wrapper script, xcowfortune, which you can cron to deliver periodic fortune cookies via the cow.|