This is a very rushed update. SteamVR on Windows will be lacking some features a lot of people got used to, but it runs. (Main one I ran into so far is screenshot management, but a lot of the big picture mode UI is not accessible due to a controller being required to push buttons)
SteamVR on Linux however, is a complete mess. It was also a mess on SteamVR 1.x, but 2.0 broke so many things. Launching any of the included apps such as room setup, changing settings, taking screenshots. I really hope they add the last 1.x version as an update branch for compatibility reasons, 2.0 is simply not ready on Linux.
Also, good luck everyone on the keyboard. It's supposed to have support for using multiple controllers, but it has been dropping and duplicating keypresses for me.