Redirect stderr to stdout
October 1st, 2006 toydi Posted in pipeline, stderr, stdout | Hits: 120949 | 6 Comments »
Very simple, just remember:
- 1 = stdout
- 2 = stderr
In python, its
unittestmodule loves to dump test results to stderr (rather than stdout). In order to pipe the results to
less, you may need to redirect stderr to stdout:
python eggtest.py 2>&1 | less
To redirect stderr into a file:
python eggtest.py 2> result.txtTo redirect both stdout and stderr into a file:
python eggtest.py &> spam.txt
October 11th, 2006 at 7:51 pm
This only valid when using bash shell but how about csh? What I have search through internet and what found out is that no direct way to redirect stderr only. The best way is
( python eggtest.py >stdout_file ) >&stderr_file
if ‘>&’ using stdout and stderr will redirect together, and like bash ‘>’ will redirect stdout only
August 5th, 2011 at 2:07 am
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April 23rd, 2012 at 1:53 am
To capture only stderr, try this:
python eggtest.py 2>&1 > /dev/null | less