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Want to timestamp into the cron logfile

Dr. Klahn
Dr. Klahn asked
Last Modified: 2020-03-22
I would like to put a timestamped separator in the cron log at midnight:

==================== 23 March 2020 ====================

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I've put an echo line into /etc/crontab, and that sends me an email that I don't want.

I've put an extended line into the crontab prefacing the echo line with { MAILTO=""; (echo here); } and that still sends the unwanted email.

I've written a script with MAILTO="" and echo lines in it which works splendidly on the console and does not send the unwanted email, but puts nothing into the cron log file.

goofling around produced no immediate results.  But Debian does something close to this, because the cron log was showing single-line timestamps when I brought the system up -- and then discovered how to disable, which I did by deleting instead of commenting out.

Is there a simple way to do this?
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