I am running Ubuntu 13.04 on a Dell machine and I want to have the exact same keyboard layout as I have on my other machine, which is a Macbook Pro with an International English keyboard. On the Mac I have the keyboard set to US Extended.
On Ubuntu I have the layout set to English (Macintosh) which gives me this layout:
However what I really want is an exact copy of the US Extended on my Mac, which looks like this:
And with the following modifiers with the alt key pressed:
The layouts are similar but there are small differences, in particular producing the character ˙ modifier on Mac is Alt-w, while under Ubuntu it's Alt-h. I've tried all the English layouts on Ubuntu but none match this exactly. Any suggestions? I'm not adverse to writing a layout config myself, if that's what it takes, but a few pointers would be welcome!