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Tristan
Asked: 2015-04-28 00:43:23 +0800 CST

Crontab, keep output log, but disable email sending

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For now I have crons like : 

45 * * * * www-data php /var/www/console cmd:dispatch --env=prod 2>&1 > /var/log/cron/cmd_dispatch.log

And I'd like to disable email sending. In order to achieve that can I add &> /dev/null like : 

45 * * * * www-data php /var/www/console cmd:dispatch --env=prod 2>&1 > /var/log/cron/cmd_dispatch.log; &> /dev/null

Would it disable only the email sending ?

cron

2 Answers

  1. If you really want to prevent cron from sending email, you would run the service with "-m off -s" arguments.

    • "-m off" disables cron emails
    • "-s" sends any output not captured to syslog

    That's presuming you want cron email completely disabled, rather than just for a given entry.

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  2. I'm not sure it will, but lets fix this properly.
    The ordering of the redirection matters.
    What you are trying to do, is to log both stderr and stdout messages to that file, so you should: 

    ... >/var/log/cron/cmd_dispatch.log 2>&1

    See also https://www.gnu.org/software/bash/manual/html_node/Redirections.html

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