Ich muss gestehen, bevor ich die Kommentare gelesen habe, konnte ich nur an Männer denken, die sich proteinreich ernähren und gemeinsam einen richtig deftigen Gemüsefurz (Krautwolke) riechen. Ich weiß nicht wo mein Gehirn falsch abgebogen ist... :(

The only thing, I can think of is that, that Czech Republic has a nice telephone code.

Thanks for the update maybe I'm a bit oldschool and need to dig deeper "in the flock" ;-)

Could you just save the pid of that cronjob in a file? (Assuming this cronjob calls bash script). Before the next run of the cronjob check if that process with that pid is still running? Hoping, I understand your problem correctly. You do not want to run the cronjob again until the first run finishes?

Fist pump, bro