I am attempting to test my cron job by setting it a few minutes (let's say 10) from the current time. For instance, if right now is 5:00 PM, I set:

10 17 * * * dotnet <full path to .net core dll>

When the clock strikes 5:10 PM, the job is not executed.

On the other hand, if I set the cron job to execute every minute:

* * * * * dotnet <full path to .net core dll>

It is successfully executed every minute.

I've looked up reasons for why a bash command doesn't execute. Unfortunately none of the suggestions explain why one works and the other one does not.

OS: Ubuntu AWS Instance Note: the date command gives me the correct time I am using as a reference.

  • I have tried to reproduce this issue in an Ubuntu aws instance I have access to, but cron just works. 28 15 * * * ubuntu touch /home/ubuntu/test.txt worked with no problems. Do you get cron-mail alerts in dotnet user mail spool?
    – Bruno9779
    Jan 2, 2017 at 15:29

1 Answer 1


Have you checked your timezone? Cron runs using local system time, so if, for instance, your system is running on UTC time but you have a TZ environment variable that's adjusting your user time, your crontab will still be executing in UTC time.

Suggested test:

Set it to execute at

10 * * * *

so it will execute in a few minutes regardless of the hour. If it works, then the most likely issue is a timezone offset making the hour you specified not the hour you meant to specify :)

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