this post was submitted on 21 Feb 2025
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Linux
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From Wikipedia, the free encyclopedia
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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Last week I accidentally overwrote my configuration.nix file with garbage. If you use NixOS this should fill you with horror. If you don't, that file contains a description of your entire system -- all the packages as well as many settings tweaks to anything from GUI apps to core kernel & systemd options.
I have now learned my lesson and started using git to track my changes. Tbh, I was naively expecting to be able to roll back to a previous config and pull out my configuration file, but that's not how it works. Happily I had already split out the most difficult to reproduce sections into their own files (mostly networking stuff), so it wasn't that catastrophic, but it still turned a few minutes of tinkering into a couple hours of forehead-smacking.