in reply to several perl scripts
You can write a shell script that launches all the perl scripts like you would do from the command line ( use & at the end of each perl script call).
You can write a perl script that forks out to the shell ( with the exec command) and call the perl scripts.
All this will launch them sequencially, that is "almost" at the same time.
You could also program them all to launch at the same time in the crontab but that's probably not what you want.
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Seekers of Perl Wisdom