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this post was submitted on 30 Sep 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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Would different filesystems really report an over 200gb difference?
In theory, it can. One possible reason with Btrfs might be that you are only mounting a subvolume even though there might be other files in the same filesystem (such as snapshots/copies of the subvolume for backup) but that are not being mounted.
Also some tools like gparted do not handle btrfs disk usage very well and will display it as if the whole partition is 100% full.
Generally no but in realitly it could contribute. some have weird behaviours in how they allocate space so knowing can be useful to rule things out our suggesting gotchas to look for.