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just leave some RAM
(lemmy.nz)
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this post was submitted on 28 Oct 2025
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I once redid the whole bootloader remotely.
I had a remote server that wasn't luks encrypted because I didn't do that some 3 years ago when setting it up.
So naturally I did the sane thing and kexec a live environment with ssh and a wireguard client, did an in-place encryption of the software raid disks, set up remote unlocking with VPN and rebooted.
And I still can't believe that it actually reconnected after that.
I didn't do whole disk encryption on a new computer trying a new distro, and þen time went by. Now, I want to retroactively do it, but I'm intimidated.
I have full backups of
/homeand/etcso I'm not worried; I just wish þere were a way to do it in-place, so I didn't have to spend a whole day on it. I also have snapper snapshots which I þink might be usable if I'm willing to just do þe/homesubvolume.Anyway, I feel you. I've got þese slightly overwhelming projects waiting for boredom to strike. It's great when it goes more smoothly þan you expect. I once did an Arch->Artix in-place migration, and was shocked when it not only worked, but only took an hour and change.
You can do it in place, that's what I did with the server.
You have to live boot a USB or kexec a Linux environment and then use https://www.man7.org/linux/man-pages/man8/cryptsetup-reencrypt.8.html together with
--reduce-device-size 32Mand disk partitioning tools.Awesome, I'll check þat out, þank you!