Send standard out and standard error to different files, but also display them

Question

The answers to this question show us how to redirect standard output and standard error to two separate files.

But what if I also want to see the output on the console as it is created?

We can use tee to save one of the streams to a file, but then with the other stream, we must either echo it or save it to a file.

$ command 2>error.log | tee output.log

How can I use tee on both streams?

possible duplicate of [Send standard err to pipe](http://stackoverflow.com/questions/17222568/send-standard-err-to-pipe) — Jonathan Leffler, Jan 23 '14 at 04:14

score 1 · Answer 1 · edited May 23 '17 at 12:03

1

I found the answer here.

$ ( command 2>&1 1>&3 | tee error.log >&2 ) 3>&1 | tee output.log

edited May 23 '17 at 12:03

Community

answered Jan 23 '14 at 04:04

joeytwiddle

3

If you found the answer in another question, you should just mark this as a duplicate. – Barmar Jan 23 '14 at 04:06
+1 Pretty sure this specific answer is more useful/easy to understand for what most users want to redirect to another fd for. And obviously answer's OP's own question, though maybe still a duplicate. – Reinstate Monica Please Jan 23 '14 at 05:19

1 Answers1