March 2017
Beginner to intermediate
422 pages
8h 4m
English
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Using crontab to run a script automatically at predefined intervals
For the last recipe in this chapter, we will look at the popular crontab utility, a service that will execute a command or script at a regular interval of your choosing. It is a vital part of the system administrator's toolbox, and one you'll find a lot of uses for, especially when connecting to sensors and Internet of Things devices.
Getting ready
If you followed the recipe to make the Raspberry Pi Zero temperature script, you are ready to go.
How to do it...
Let's start logging the temperature of the Zero to a text file. We will take a reading every minute and save it in the /var/log/rpz_temp.log file. Over the course of a day, especially on days when you are using the Pi a lot, ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.