In order to remove the gnarly (imho) purple splash screen during Ubuntu boot, you have to remove some Grub boot parameters.
The settings and tweak apps in Gnome doesn't allow you to easily change the stark background color of the default login background for Ubuntu. Let's fix that.
This quick guide shows how to set up Git to use PGP signatures on each commit, and show a verified badge on your GitHub commits. By using gpg-agent, you also don't have to enter the passphrase each time you commit.