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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For anyone else reading along: This person is talking out of their ass.
I also find that calling systemd "SystemD" is a tell that someone is unfamiliar with or has a conspiratorial relationship to it. It's named "systemd", all lowercase (but I'm likely to capitalize it on sentence starts like a normal word). Using an ungrammatical uppercase D at the end of the word, that isn't even something the creators claim is correct, is … a choice.
(And it's a choice that reminds me of e.g. how rabid anti-cyclists in Norwegian can't even spell "cyclist" correctly, but instead consistently use "bicycleist".)
Ok, fair point on the capital D, I must have read it like that years ago and it stuck. I shall have to make an effort to unlearn it.
As to the rest, systemd has been a constant thorn in my side ever since L. Pottering published "Rethinking PID 1" back in 2010 or so. I found, and still find, that most of the assertions and actions in that document either don't really hold, or just aren't really relevant. Basically it's trying to solve a problem that really wasn't an issue in the real world, and does so in such a massively overbearing way that everything actually becomes more laborious than it otherwise would be. From my perspective it's an unnecessarily complex and poorly architected attempt to answer a need that was better served in different ways. That it's become a near mono-culture is deeply concerning.
I've also run into all sorts of awkward edge cases and misfeatures over the years, from the automounter that occasionally didn't to race conditions that only manifest at the worst moments, none of which would have occured had the basic tenet of "do one thing and do it well" been followed. The extreme verbosity of the configuration, and unnecessarily large number of places it can be spread just serve to make it even more unpleasant to deal with compared to the simplicity of init scripts, crontabs and the like.
The sad thing is, there's undoubtedly some good ideas buried in it, but they could all have been implemented much more lightly and in a way that worked with the rest of the ecosystem rather than fighting it. Things like starting daemons in what is essentially a repeatable sandbox, or being able to isolate logging per service. They could, and had both been implemented already, but systemd has a real "not invented here" problem, so everything was built again, with all the attendant bugs, and design issues that inevitably brings.
Ultimately clients pay good money for me to look after their systems, systemd or not, so I probably shouldn't grumble, but I miss the days when Linux was a clean and elegant system, without this multi-tentacled thing sitting on top of it.
I also have a sysadmin/devops/sre type career, and my impression is rather the opposite: With systemd Linux became a lot cleaner and predictable, compared to the mess of shell scripts we had before. There's never been anything clean or well-architected about shell scripts, they've always been a messy collection of not-quite-the-same languages that have all safeguards turned off by default, and it's up to the programmer to turn them on and hope they actually work. Good for one-shots and exploration in the terminal, though.
I also don't miss logrotate or finding out that some app places its logs somewhere mystical. Being able to read app logs just by knowing the service name is wonderful, as are the timestamp and boot arguments.
systemd didn't appear as just one guy's brain child, nor could it rise to the dominance it has if the way it works was as controversial or bad as it is in your opinion.
I haven't been on-call for the past few years, but my impression is that there have been fewer and fewer on-call events over my career. That's also largely on app developers and a shift to Kubernetes, but it's a generally pleasant change. There's nothing I hate more than being woken up.