A few days ago, I came across a CentOS 8 32-bit distro and decided to test it on an old 32-bit machine. After booting up, I realized there was a bug causing the network connection to drop. Every time I rebooted, I had to manually bring the network back up, which led me to wonder: How can I automate this process with a script that runs every time the system boots?
The solution is straightforward, and today, I’ll show you how to do this using systemd service units, but before we jump into that, let’s first take a quick look at what a service unit is and how it works.