this post was submitted on 11 Oct 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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Alpine for example uses musl, and Gentoo offers it as an option.
I don't completely understand the benefits, my own programming experience is several layers away from inner workings of an OS, but at least some distros claim there is space for improvement.
This compares GNU's libc with musl (aims at POSIX conformance and being lightweigth), uClibc (size) and dietlibc (size but has no full support?).
It leaves out Google's bionic, used in Android, which is not compatible with GNU's libc... go figure...
So most alternatives aim to be smaller and some also focus on standards compliance (GNU's libc is not fully POSIX-compliant AFAIK).