Will the cron script run if the previous script is still running?

Question

linux

Let's imagine that there is a php script that runs cron once a minute. If the script was launched and takes a long time, will the same script run through cron at the right time? It turns out, they will be executed in parallel? More precisely, two copies will be executed independently of each other? Or will they be queued and the second one will run after the first one is done?

Answer 1

in parallel

Answer 2

CRON does not know how to lock, you will either have to hack your own using, for example, flock, or use systemd-timer - there are locks and delays out of the box, and it’s much more convenient to set the execution time.
https://habr.com/ru/post/535930/