Typing # on Linux using a UK Apple Mac Keyboard
Simple Answer
Use Right-ALT + 3 to type a # on Linux using a UK Apple Mac Keyboard.
The Slightly Longer Answer
The UK Apple keyboard layout does not have a Hash (#) key on it, and in mac it is typed by pressing ALT+3.
This didn’t appear to work in Xubuntu, until I ended up mashing the keyboard with anger and found out that you need to use the right alt key, then it works.
No, it’s not that interesting, but if someone is as silly as me, and googling for an answer, I hope they find this 