It was also actually pretty fun!
this post was submitted on 02 Aug 2024
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Impressive, sounds like magic, tbh! You know any tutorials?
Not really, I pulled it together from a bunch of random posts lol
Maybe I should write one, but in essence you:
Stop all non-OS essential services
Create a filesystem in a chunk of RAM
Pull essential OS files from the installed OS into it recreating needed directories (Though you could probably just use a tiny pre-built distro but meh)
Pivot root into it
Reload services (when they restart they'll be restarted in the context of where you pivot rooted, prior they're still running under the context of the installed OS)
Unmount the boot drive
Then do what ever you need to do
???
Profit
How exactly so you pivot root? Simply chroot or something more involved?
The man page has a good example.
https://www.man7.org/linux/man-pages/man8/pivot_root.8.html