Hello Knox,
First of all thank you for your clear instructions on CBT-nuggets!
I ran into an issue when I wanted to install ansible.
When I pasted in "sudo apt-add-repository ppa: ansible/ansible" I got the message "Error: need a single repository as argument". I searched online and came with an solution that helped me: between ppa: ansible/ansible there has to be no spaces in order to work. It worked for me when I used the command "sudo apt-add-repository ppa:ansible/ansible"
Kind regards.