this post was submitted on 26 Oct 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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Use Virtmanager, its native on the Kernel (KVM) and doesnt need weird Kernel modifications.
So Ubuntu is really old regarding this. The solution you are looking for is BTRFS, standard on Fedora and Opensuse. It allows snapshots (that both systems automatically create afaik), and this is a specific capability of that filesystem, as these snapshots can be created while using it.
Its really powerful and somewhat magic, as you see no performance lack.
Isolating your home, maybe. Isolating
/var
could also be nice if you use Flatpaks.Or just get an immutable System, if you need weird packages use Distrobox/Toolbox, if you want system mods try Ublue.it or layer/remove a few packages, and be happy with Flatpaks for the rest.
To answer your question, Opensuse and Fedora do the snapshots automatically. Just enable offline updates to use this feature more reliably (afaik).
I personally broke Linux Mint, Kubuntu, KDE Neon and Fedora KDE, so I switched to Kinoite.