this post was submitted on 02 Aug 2024
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    What can I say, I didn't want to wait on my provider lol (lemmy.world)
    submitted 4 months ago by cm0002@lemmy.world to c/linuxmemes@lemmy.world
    46 comments fedilink hide all child comments
     

    It was also actually pretty fun!

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    [–] cm0002@lemmy.world 88 points 4 months ago (4 children)

    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

    [–] exu@feditown.com 25 points 4 months ago (2 children)

    How exactly so you pivot root? Simply chroot or something more involved?

    [–] cm0002@lemmy.world 74 points 4 months ago (2 children)

    chroot isn't enough, you need "real" pivot_root

    chroot just changes the shells root point, pivot_root actually changes the root mount point and enables this trick to work

    [–] 4am@lemm.ee 27 points 4 months ago

    This is god-tier technique, kudos

    [–] pineapplelover@lemm.ee 12 points 4 months ago

    Holy fuck

    [–] barkingspiders@infosec.pub 15 points 4 months ago

    I work in this field and I think this is 🔥 af

    [–] InnerScientist@lemmy.world 6 points 4 months ago

    FYI you can use kexec and a prepared initrd to do something similar with only one command.

    [–] Wilzax@lemmy.world 3 points 3 months ago

    Imagining this process, despite having never done 50% of the steps on the list, makes my brain imagine this: Turning a sphere outside in