How can one map the key combination
Shift-Win to work as
AltGr on Debian-based Linux distributions? XKB is very sparsely documented indeed!
The easiest way I know of is to run
I think Alt Gr is either
Then you can put something like the following in your shell initialisation file, e.g.
See man xmodmap for more, and these pages:
A different way to do it in Ubuntu may be via System->Preferences->Keyboard->Layouts->Options... Personally, I'm never sure what all those wordy descriptions mean ("Alt and meta are on alt keys"?).