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bashstderrtee

How to tee to stderr?

I want to split stdout so that it is printed both to stdout and stderr. This sounds like a job for tee but the syntax is evading me -

./script.sh | tee stderr

Of course, how should stderr actually be referred to here?

Solution 
  • ./script.sh | tee /dev/fd/2

    Note that this is dependant on OS support, not any built-in power in tee, so isn't universal (but will work on MacOS, Linux, Solaris, FreeBSD, probably others).