I've seen (and answered) quite a few questions on changing key 'A' to do key 'B' or make key 'A' do 'So and so' etc.  I was thinking it might be a good idea to have a general canonical question for remapping key bindings.  



If it's a good idea, we should get someone to ask the question. 
Some programs to start with would be `xbindkeys`, `xmodmap` and `xkb`.  I could do `xbindkeys`, but I don't really know much about the others.

What does the community think about this?