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shellgnu-parallel

GNU parallel double-dashed options not working

I am trying to run the following very simple parallel script:

 parallel --eta -j 1 -- "echo hi"

but I get an error 

parallel: invalid option -- '-'
parallel [OPTIONS] command -- arguments
    for each argument, run command with argument, in parallel
parallel [OPTIONS] -- commands
    run specified commands in parallel

This happens for every double-dashed option I try to use

Solution

  • You are using Tollef's parallel from Moreutils, and not GNU Parallel.