Bash - output redirection

Question

I'm trying to redirect error output to both a file and the terminal and throw away standard output, but I can't figure it out. Does anybody know how to do it?

Answer 1

myCommand 2>&1  1>/dev/null | tee /path/to/some/file.txt

STDOUT gets black-holed into /dev/null

STDERR gets redirected to STDOUT

tee receives STDOUT and re-echoes it as well as writing it to file