Raku Fundamentals: A Primer with Examples, Projects, and Case Studies

© Moritz Lenz 2020

M. LenzRaku Fundamentals https://doi.org/10.1007/978-1-4842-6109-5_6

6. Silent-Cron: A Cron Wrapper

Moritz Lenz¹ 

(1)

Fürth, Bayern, Germany

 

On Linux and UNIX-like systems, a program called cron¹ periodically executes user-defined commands in the background, according to schedules defined by the user. It is used for system maintenance tasks such as refreshing or removing caches, rotating and deleting old log files, and so on.

If such a command produces any output, cron typically sends an email containing the output so that an admin can look at it and judge if some action is required.

But not all command-line programs are written for usage with cron. For instance, they might produce output even on successful execution and indicate ...