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?

John Kugelman · Accepted Answer · 2011-06-16 13:52:39Z

14

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

edited Jun 16, 2011 at 13:52

John Kugelman

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answered Jun 16, 2011 at 13:03

James C

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3 Comments

user219882 Over a year ago

I was close :) I had this command and it didn't work myCommand 1>/dev/null 2>&1 | tee /path/to/some/file.txt. Your solution works. Thank you

James C Over a year ago

I tried your solution first then remembered they should be the other way around ;)

Larry Morell Over a year ago

The order matters because the redirections are interpreted from left to right. Hence the first redirection sets sets stderr to the same stream as stdout. Then the second one switches stdout away.

nsfyn55 · Accepted Answer · 2011-06-16 13:05:50Z

0

See this post. You will need to use the tee command to direct in multiple directions.

http://www.linuxforums.org/forum/programming-scripting/163161-redirecting-stdout-file-terminal-stderr-file.html

answered Jun 16, 2011 at 13:05

nsfyn55

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