62 lines
4.0 KiB
Plaintext
62 lines
4.0 KiB
Plaintext
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Episode: 447
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Title: HPR0447: Lord Drachenblut Recovers Data After a Failed Dist-Upgrade
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Source: https://hub.hackerpublicradio.org/ccdn.php?filename=/eps/hpr0447/hpr0447.mp3
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Transcribed: 2025-10-07 20:45:26
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---
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And welcome to Hacker Public Radio.
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Today I'll be your host, Lord Drachenblut, the digital dragon.
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All right.
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So recently I decided to make the jump from Kabuntu 904 to Kabuntu 910 while it's still sitting in the Alpha stages.
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Unfortunately, during the upgrade or the dist upgrade process I should say,
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I ran into a minor bit of problem.
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My system ended up in an unbeatable state.
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Now, it left me with a couple options.
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One, I could sit there and fight and try to get it back to a fully functional state,
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which I probably could have done, but also knowing that some of the things
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between Kabuntu 904 and 910 had changed, such as the Grub2 loader was now native,
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and EXT 4 support was the standard for an install.
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I decided that I would just back up my data and go from there.
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Well, as people who have listened to me on various things,
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I tend to go with the option to do an LVM2 encrypted install.
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So, recovering my data, because my backups were a little out of date, unfortunately,
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which will be my subject for my next one is easy backup.
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But anyway, I had to do some digging on how to recover from an LVM2 encrypted partition,
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and today I want to share with you how to do that recovery.
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First and foremost, I grabbed, since I already still had it, the Kabuntu 910 live CD.
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And yes, you're going to need the live CD versus the alternative installer,
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which I used for my install later.
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But it's a pretty simple process you want to do from here.
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After you have the live CD in and going in a live internet connection to the machine in question,
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you want to do a sudo app get install LVM2 space crypt setup.
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These two packages are required to be able to mount and read encrypted partitions.
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The next thing you want to do is sudo mod probe dm slash crypt.
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Then you want to do a sudo crypt setup lux capital O pe in that's lux open slash dev slash.
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In my case, it was sda one followed by the word crypt one.
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Now, I'm going to have to double check because my notes are a little sketchy with me at the moment.
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But I believe crypt one is all one word and that's crypt the number one.
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After that's done, you next want to do sudo vgscan space dash dash mkno ds make notes.
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Next, you want to make a volume where you can or you want to make someplace you can mount the volume in question.
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Then I just did a sudo mkdi r volume from within the live CD's home directory.
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Then a simple sudo space mount space slash dev slash in my case, it was ember slash root space volume.
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I should mention and I'm sorry I didn't do this to the right the first time.
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But the sudo vgscan dash dash mkno ds will tell you what the name of your encrypted partition is.
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Just tacking on the slash root at the end in the sudo mount slash dev slash ember slash root in my case.
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We'll mount it in the volume directory you created in the home partition.
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Now you can take your chosen method to recover your data.
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In my case, I like to just tar up the home directory and move it off the machine with a USB hard drive of some nature or flash drive if you've got that little data.
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I then proceeded to do the reinstall.
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Move the tar to folder back to my home directory untard it.
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Now one thing in the tar when I untar and I don't have the full string with me.
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But I add the dash p option when I untar.
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This will maintain the permissions that are already there.
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Which if you're using the same username when you reinstall makes life a little simpler and a little faster to get back up and running.
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Well, I'd like to thank you all for listening.
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If you enjoyed the episode, you can send me an email at lord.drockenblut at gmail.com.
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If you want, if you have anything you feel you need to add to this.
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Please email me or get in contact with enigma or klatu and create your own episode.
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Hacker Public Radio is a community run project and we can always use more people.
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So until next time, later.
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