It works fine for me. thanks Bad_Habit!

But T4UR14N, whatever your problem is, it has nothing to do with what was posted: there is nothing there that interacts with apt.

Possibly you put a horrendous typo into something in /etc/network/if-up.d/ and now you cant get a net connection??

You could avoid these sorts of problems generally by not duplicating other peoples' operating system modifications until you can reasonably understand what those changes are.
Commands that start with "sudo", or that modify files in /etc or /usr should sound off warning bells in your head.
On the other hand, breaking your linux system can be a great way to learn about it -- just understand that when you do, it will be your own fault!!

(These steps can be mostly undone by just doing them in reverse, that is, remove the 4 NEW files that you created,
Then to fix sshd, remove the 2 new # marks from /etc/event.d/sshd, and get rid of any lines added to /etc/ssh/sshd_config,
then the knowledgeable or brave soul would have to do
sudo update-rc.d -f ssh defaults)