Typing the escape character ^] on a non-english keyboard

This works on a Norwegian keyboard, but may apply to others.

So, your terminal says something like:

Connected to foo
Escape character is ^]

So, ] is easily typed using “Alt Gr + 9” on my keyboard, but “Ctrl + Alt Gr + 9” does not produce an escape character.

However, “Ctrl + 5” does, for whatever reason. If you have a non-english keyboard, try using ^5.