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bashshellnohup

make nohup write other than nohup.out

I've been using below command to make tail to write nohup.out and also print the output on the terminal.

nohup train.py & tail -f nohup.out

However, I need nohup to use different file names.

When I try

nohup python train.py & tail -F vanila_v1.out

I'm getting following error message.

tail: cannot open 'vanila_v1.out' for readingnohup: ignoring input and appending output to 'nohup.out': No such file or directory

I also tried nohup python train.py & tail -F nohup.out > vanila_v1.txt

Then it doesn't write an output on stdout.

How do I make nohup to write other than nohup.out? I don't mind simultaneously writing two different files. But to keep track of different processes, I need the name to be different. Thanks.

Solution

  • You need to pipe the STDOUT and STDERR for the nohup command like:

    $ nohup python train.py > vanila_v1.out 2>&1 & tail -F vanila_v1.out

    At this point, the process will go into the background and you can use tail -f vanila_v1.out. That's one way to do it.

    A little more information is available here for the STDOUT and STDERR link. Here is another question that uses the tee command rather that > to achieve the same in one go.