$ rm file
$ echo $?
$ 0
Silent, unless you go looking. The return value of the last executed command is available as $?.I picked this up at http://www.rsync.net/resources/howto/remote_commands.html for running commands over ssh and not seeing the console output.
I disagree, as the average vault user is likely someone familiar with Unix (though there is a Windows binary). Here is an example that I just ran on my machine.. very silent.