How do I paste into the "crosh" terminal in a Chromebook?
Ctrl + Shift + v works for me in crosh. Chrome OS Version 21.0.1180.83.
I haven't tried crosh, but maybe it is shift+ins, like in a linux terminal.
Doing a two finger click, aka right click, works too.
Right click is a common way of pasting on many *nix systems.