this post was submitted on 03 Dec 2025
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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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Those things you listed are part of the fact, not all. Like saving 100kB. It does not matter in your 1TB hard drive, but it's night and day in embedded systems. No benefit for you isn't the same to no benefit.
I mean, you can cross-compile to generate a Gentoo rootfs for the embedded system.
I worked on embedded systems for audio devices. I of course endorsed Alpine as well, but with musl as the C library I got weird bugs of stuttering audio output.
With Gentoo I get the option to build my entire system with musl as well, but I would rather have that bug not in my system. That's what Gentoo offers: options.
By "LFS", I think you mean Buildroot, practically. Buildroot is also highly customisable, but Buildroot isn't a distro. Like LFS, there is no way yo update a system, only rebuilding with latest packages. It also does not have flags for the whole system, so you're on your own if you want to disable, say IPv6, in the whole system.