How to add a ppa from a launchpad link

How can I add this ppa:

https://launchpad.net/~ermshiperete/+archive/ubuntu/monodevelop

to Ubuntu by a command?

So given a launchpad link how can I created the appropriate command?

Open the Other Software tab in Software & Updates

sudo software-properties-gtk --open-tab=1

click on Add

type in the ppa - then click on Add Source

Then click on Close.

Now install your package.

sudo apt-get install monodevelop