this post was submitted on 18 Oct 2023
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Linux
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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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So complex:
// take a read-only snapshot:
btrfs sub snap -r fs snapshot
... do things on fs
// rolling back:
btrfs sub del fs # at which point you'll lose those things you've done
// if you want to preserve them, just rename fs instead
btrfs sub snap snapshot fs # reinstate snapshot as a read+write fs btrfs sub del snapshot # delete the non-longer needed read-only snapshot