Skip one-click backup apps. This rsync script gives you full control over what gets saved and when, plus logs and a few hard-won lessons.

This post follows up on Part 1 by examining the many ways that you can test the value of variables – e.g., whether they equal particular strings like “yes” or “no”, if they have a numeric value, if ...

If you run into problems building, testing or running complex bash scripts, don’t lose heart. There are many ways you can help ensure that your scripts will work flawlessly. In this post, we’ll ...

In this tutorial, you will learn how to write Bash scripts that run on Ubuntu and encode and package multiple files to HLS/DASH output using open-source tools FFmpeg and Bento4. You’ll learn how to ...

If you are building a robot, sensor platform, weather station then you don’t want the code to stop running when you disconnect from the terminal, and nohup is just the thing for you.In this how-to, we ...

I've recently written about using bash arrays and bash regular expressions, so here's a more useful example of using them to test IP addresses for validity. To belabor the obvious: IP addresses are 32 ...

I have the following bash script which tests 2 jpgs and displays a message if they are different.<br><br> diff -a --brief fullsize.jpg fullsize.jpg.bak<br> echo "diff=$?"<br> if [ $? -eq 1 ]; then<br> ...