[racket] Installing on Ubuntu, "command not found"

ftw. Apparently a 32/64 bit incompatibility is helpfully reported as
> "command not found", which is impossible to search for, but once I had
> the above details I found a few pages that gave more info; on their
> recommendation I installed the following packages:
>
>   lib32gcc1 lib32stdc++6 lib32asound2 lib32ncurses5 ia32-libs
>
> (possibly not all required in the Racket case, but I installed them all
> anyway).  Everything seems to be working now.
>

Running 'strace racket' might have helped as well, then you could see it
failing to load the 32-bit libraries.