To prevent mail messages piling up from your crontab commands you add the following at the end of your crontab line:
>/dev/null 2>&1
or
&> /dev/null
Cron @reboot execute command on system start like rc.local
Everyone knows that crontab entries look like this:
* * * * * /usr/local/bin/my-script
Which will execute command “my-script” every minute.
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