Modify systemd service configuration by using drop-in files, which is useful for automation when using ansible or any other provisioning, configuration management, and deployment utility.
This is an extension to an older blog post on how to mount WebDAV share using systemd as this proved to be a very reliable method that is easy to mark as a dependency for other services.
Update the system time using systemd as a NTP client.
Make iptables configuration persistent using systemd file with additional possibility to disable firewall after defined period of time.
You can check my earlier blog post on how to mount WebDAV share using command-line or fstab (file systems table), but you are not limited to these two options as you can use systemd to take care of the whole process and automount WebDAV resource on demand.
It is a matter of personal preference whether you use current or former network device naming convention. I am more accustomed to the latter and will configure the operating system to retain the old behavior.
There are many different ways to set NOOP scheduler on the first hard drive at system boot. I have decided to use simple systemd service, but alternatively you can use udev to automatically configure every SSD device (see References section).
Today, I will show you how to set all tunable PowerTOP options at boot time using systemd service.