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I have been working happily in Ubuntu 16.04. This morning, the update icon offered me an upgrade to 18.04.

Since I have upgraded several times before, without problem, I went ahead. Very soon, there were many, many alerts saying things failed. I could not get control back in the UI.

I was able to get a login shell by selecting a recovery kernel. However, no apt, apt-get, or dpkg commands work.

I downloaded an 18.04 iso file, with the idea of making a DVD and installing from that. Not sure if that's the best way to go, though.

At least I have my home directory.

How should I proceed?

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    I would run a live cd and get all your files off onto a thumb drive or hard drive before anything else. Then a fresh install of 18.04 is the best. The direct upgrade is usually not recommended till the first point release. 18.04.1 which comes in July or August. May 9 '18 at 7:24
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    I hope they tell everyone this @walttheboss! May 9 '18 at 7:32
  • Much appreciated, @walttheboss. I'm ashamed to admit I'm a bit confused by "running a live cd". Maybe I'm just a bit muddled from tangling with this all day. Is that just synonymous with booting off the .iso in its CD or DVD or USB incarnation?
    – davernator
    May 9 '18 at 7:49
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    And, @George Udosen, I hope that as well.
    – davernator
    May 9 '18 at 15:46
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    Okay. 2 days later. Thanks to the excellent advice from @walttheboss and user535733, I am back up and running. Soooo ... FIRST, per advice, I saved my home directory (straightforward, but not trivial by any means due mainly to size ... wireless would stall after a while, so I had to use ethernet and an external hard drive). Then, with a DVD burned from an official Ubuntu 18.04 desktop .iso file, I started in on that clean install. Soon I was up and running. Just had to carefully tweak for chrome bookmarks etc. ... apt'd emacs, gcc, etc.. All seem to work, knock on wood. Thanks again, gang!
    – davernator
    May 11 '18 at 14:52

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