Print output to console while redirect the output to a file in linux

Question

I am using python in linux and tried to use command line to print out the output log while redirecting the output and error to a txt.file. However, after I searched and tried the methods such as

python [program] 2>&1 | tee output.log

But it just redirected the output the the output.log and the print content disappeared. I wonder how I could print the output to console while save/redirect them to output.log ? It would be useful if we hope to tune the parameter while having notice on the output loss and parameter.

CS Pei · Accepted Answer · 2018-12-18 02:01:57Z

2

the method you found is correct. Here is an example, you can try it yourself.

''' a.py '''
print('hello world')


$ python a.py 2>&1 | tee out.log
 hello world

So I think your program may did not output correctly

answered Dec 18, 2018 at 2:01

CS Pei

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Comments

thelogicalkoan · Accepted Answer · 2018-12-18 02:28:58Z

0

You can create a screen like this: screen -L and then run the python script in this screen which would give the output to the console and also would save it the file: screenlog.0. You could leave the screen by using Ctrl+A+D while the script is running and check the script output by reattaching to the screen by screen -r. Also, in the screen, you won't be able to scroll past the current screen view.

edited Dec 18, 2018 at 2:28

answered Dec 18, 2018 at 2:07

thelogicalkoan

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2 Comments

exteral Over a year ago

screenlog.0 would be saved automatically ? to where ?

thelogicalkoan Over a year ago

It will be saved to the directory you do screen -L.

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