This page is used to 'host' a personnal Knowledge Base with some short gists, cheatsheets and bookmarked-urls.
sql> select * from KB_cards where tags like '%crontab%'
If you want to periodically perform a task (e.g. sending Emails, backing up database, doing regular maintenance, etc.) at specified times and dates on a Linux or Unix system, you will probably need to use a Cron. The configuration file is quite simple but it is possible to have some doubt about the date/time order to use:
Here is a crontab-generator.