Linux Crontab command scheduled task basic syntax and operation tutorial-VPS/Server Automation

Crontab is a commonly used scheduled execution tool under Unix/Linux systems, which can run specified jobs without manual intervention. Many times we have to use the Crontab command. For example, the acme.sh script mentioned in the Let’s Encrypt Wildcard free domain name SSL certificate uses the Crontab scheduled task to update the SSL certificate.

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