Seems like the Linux part of Wikipedias Table of keyboard shortcuts article hasn't been updated in a while.
I went trough and removed/updated some deprecated stuff and added some stuff that wasn't there. For Gnome. And I learned some new stuff in the process.
But there's also some stuff there I'm not sure about and didn't touch even if I think maybe it should be changed. If you have some time, maybe you could have a look?