5

The command parallel echo {} ::: A B C executed from the command line return the correct result, while when invoked within a bash script return the error:

This is the script:

#script.bash
#!/usr/bin/env bash

parallel echo {} ::: A B C

This is the output:

bash script.bash
/bin/bash: {}: command not found
/bin/bash: ::: command not found
/bin/bash: A: command not found
/bin/bash: B: command not found
/bin/bash: C: command not found

Any idea why and how to correctly call GNU parallel within a bash script?

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  • Add the script you are running to the question. Commented Jan 13, 2014 at 11:57
  • Edited with script, really basic as you can see. Commented Jan 13, 2014 at 12:01

1 Answer 1

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6

Apparently the --tollef switch (that does not support the ::: syntax) gets enabled when you run it from a script.

You can fix it either by enabling the --gnu switch as with

parallel --gnu echo {} ::: A B C
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9 Comments

For example: parallel echo {} $JOBID ::: $(ls), would produce 1,2,3,4. Similar to LSB_JOBINDEX on LSF
@memecs No I haven't seen anything like that on gnu parallel. That does not mean that it does not exist though :)
If it exists it's difficult to find... :). Anyway, thanks a lot for you help
See {#} in man. Also walk through the tutorial: gnu.org/software/parallel/parallel_tutorial.html
@user000001 is --tollef enabled even if you've deleted the option from the file /etc/parallel/config or deleted the config file entirely? On my system that doesn't happen (though I was burned by the --tollef flag in the past, before deleting the config file). See also: stackoverflow.com/a/16448888/868718
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