Redirect (>) command does not print some tail of output to file

Question

I tried to print output result of my python program to log file using by this command:

./project.py > result.log

And when i opened result.log i found one problem. It missed some tail of output i think it's about 5 - 15 of the last lines

How to solve this problem?

Addtionnal information:

is there an issue in your program where python code breaks and stops the logging.you check is your code running good — sundar nataraj
– sundar nataraj, Commented Jul 15, 2014 at 6:45
I'm sure. It's running well. When i didn't use redirect i got the full output on terminal. but when i used > i missed some tail of information. — fronthem
– fronthem, Commented Jul 15, 2014 at 6:49

sundar nataraj · Accepted Answer · 2014-07-15 06:54:56Z

1

Try running following command

./project.py > result.log 2>&1

It may be possible that missing lines are going for stderr instead of stdout.

sundar nataraj

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answered Jul 15, 2014 at 6:54

Sohan

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Comments

Changgeng Zhao · Accepted Answer · 2019-04-16 20:29:07Z

1

That's the STDOUT flushing problem. It will buffer your output until some internal buffers are full. Try this to set stdbuf to line buffer mode:

stdbuf -oL ./project.py &> result.log

answered Apr 16, 2019 at 20:29

Changgeng Zhao

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