How to write a cron schedule for every 3 hours from 7am to 10pm

[vishwa]

How to write a cron schedule for

every 3 hours exclude from 10pm to 7 am 

[richgalloway · Accepted solution]

Looking at it as every 3 hours from 7am to 10pm gets you * 7-21/3 * * *.  Change the first asterisk to a number (0-59) if you want the schedule to be once each hour rather than every minute.

[vishwa]

Hi @richgalloway 

My ask was 

Corn schedule: every 3 hours exclude from 10pm to 7 am 

We don't want to receive alert from 10 pm to 7 am

[richgalloway]

Excluding 2200-0700 is the same as including 0700-2159, which is what the cron schedule I offered does.