When using an init system with Linux, you are most likely going to be using Systemd. Systemd is what comes with the majority of Linux distros as of current. However, there has been a lot of criticism against Systemd. Luckily, there are other init systems that you can use. I am going to provide some of the alternatives, and you can decide for yourself what you would like to use as a init system.
@lorabe
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Politically i dislike systemd, it just gives Red Hat too much control over GNU/Linux.

But functionally, systemd is an amazing… linux framework, let’s say, and as an operative system that rules over the supercomputer market and the server market, you need that. GNU/Linux has to be the most advanced operative system on earth since it operates on the most advanced fields. So it’s just natural that Red Hat wanted such thing.

@sgtnasty
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Have you tried OpenVMS? Just saying…

@Blattstruktur
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  1. There is also Shepard, Guix’ init system.
  2. OpenRC still uses sysvinit under the hood as default I think?
  3. I really doubt any init is as fast as systemd especially under high load. Init freedom is still a good thing :)
  4. Links are “Unclickable for your security”? What? Is this about preemptive loading of links?
@SudoDnfDashY
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A lot of links on posts will lead you to the correct website, but add their affiliate links or promo codes. It’s always safer to just copy/paste.

Systemd is faster on good hardware, but booting with systemd on my hardware takes about double the time then it does with runit.

Helix
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It’s always safer to just copy/paste.

Or you could read the popup of your browser.

Copy paste can actually inject code which isn’t visible so you’d have to paste into a text editor and then into the URL bar to be safe.

@lorabe
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Guix is cool, anything that is written on common lisp/scheme is cool.

@Echedenyan
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OpenRC can be used on top of BSD-style init, on top of SysVInit or can be used as its own with OpenRC-init.

@SudoDnfDashY
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deleted by creator

@sgtnasty
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As a service back end developer, systemd has made life easier. But I never worked with the others.

@Ripuli
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I’ve been happy with systemd but it’s good to have alternatives

Helix
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There’s also InitWare which is a fork/reimplementation of systemd with less interdependent parts. That means it doesn’t only run on Linux but also BSD and possibly other kernels.

@sgtnasty
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There is also launchd from Apple. And didn’t Canonical make one in the Unity days?

@blank_sl8
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Canonical’s was Upstart, iirc. No longer maintained.

musicmatze
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They dropped support because systemd is superior.

@SudoDnfDashY
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True, but you have to take into consideration that when they made upstart systemd wasn’t a thing.

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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