this post was submitted on 16 Dec 2024
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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
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This is a configuration declaration abstraction issue. Systemd timers and services are more like primitives.
In NixOS, we have an abstraction that allows simple declaration of a service and timer that runs some script.
As an example, I use this to export my paperless for backup daily in a way that is safe (paperless itself cannot run during that time, guaranteed by systemd) and simple:
https://github.com/Atemu/nixos-config/blob/ca0d39eb98c62424208487f973573478268048b4/modules/paperless/module.nix#L59-L95
(Even without NixOS domain knowledge you should be able to follow what's going on here.)
All that's needed in order to cause a systemd timer to be created for this service is to declare the
startAt = "daily";at the bottom.I love this, I have nixos on my server and it handles all the services this way