What is the correct cron entry format?

S

Sebastian Pereira2014-01-29 13:09:50

Task Schedulers

Sebastian Pereira, 2014-01-29 13:09:50

30 4/9 * * *
I need to execute a script every 4 hours, but the reference point is 9 hours : 30 minutes. Did I spell it right?
PS 9:30, 13:30, 17:30, 21:30, 1:30, 5:30

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2 answer(s)

N

Nikolai Vasilchuk, 2014-01-29
@uJlJluduAH

Only this way:
Here is a service that can help: cron.schlitt.info

R

RenderRR, 2014-01-29
@RendeRR

www.cronmaker.com