this post was submitted on 20 Jul 2023
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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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Ext4 is probably going to be the fastest. When it comes to reliability, old is good. If you don't need any of the features Btrfs and ZFS, you'll reap higher performance using Ext4. Otherwise ZFS is more feature-complete compared to Btrfs, however it's generally not available as root fs option in OS installers. Ubuntu used to have it as an experimental option but I think that's gone now. If you know what you're doing you can use it as a root fs. Personally I'm using Ext4 on LVMRAID on a 2-way NVMe mirror. I might be switching to ZFS on root when I get to rebuild this machine. All my storage is using ZFS.