How to silence output in a Bash script?

Question

I have a program that outputs to stdout and would like to silence that output in a Bash script while piping to a file.

For example, running the program will output:<

Answer 1

Useful in scripts:

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Get only the STDERR in a file, while hiding any STDOUT even if the program to hide isn't existing at all (does not ever hang parent script), this alone was working:

stty -echo && ./programMightNotExist 2> errors.log && stty echo

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Detach completely and silence everything, even killing the parent script won't abort ./prog :

 ./prog /dev/null 2>&1 &