Pass the same file to several parallel unix commands that all run different Perl scripts
With GNU Parallel
parallel perl {} textfile.txt ::: myscript*.plRun with parallel --dry-run ... first if you want to see what it would do, but without actually doing anything.
Note that if you have 4 CPU cores, it will start 4 jobs in parallel and then start a new one each time a job finishes, and that is subtly different from having all running at once. If you have, say 32 jobs but only 4 cores and all 32 should be running at once, use parallel -j 32 ... for example.
run_all_perl() ( perl_scripts=( myscript1.pl myscript2.pl myscript3.pl myscript4.pl myscript5.pl myscript6.pl myscript7.pl myscript8.pl ) for script in "${perl_scripts[@]}"; do perl "$script" "$1" & done wait)run_all_perl textfile.txt