1. How can I make a program produce no output on the shell screen if
it has no special "quiet behavior" option and >/dev/null doesn't help?
(the messages are not errors- or warnings-like).
2. sh: which: command not found
sh: zsoelim: command not found
sh: geqn: command not found
sh: gtbl: command not found
How can they be found? (I mean package, URL or anything else.)
