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I want to update my Ubuntu 17.04 to 17.10 while preserving most of the system settings. I currently can't update it using update-manager and also do-release-upgrade due to this issue so I thought if I could update using Live CD but when I booted the Live CD and went through the installer to selection page for some reason there were only 3 options available:

  • Erase Ubuntu 17.04 and install Ubuntu 17.10 alongside Windows
  • Erase disk and install Ubuntu
  • Something else

Rest all options were grayed out. While searching on the internet, I came across cdromupgrade but that doesn't exist in the ISO. Is there any way I can update from the ISO/Live CD?

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Is there any way I can update from the ISO/Live CD?

From the installer the only method that works:

  • "something else"
  • Mount / and do not pick "format" if /home/ is part of /.
  • Mount /home and do not pick "format".

You can also make a backup of /home/ (copy /home to an USB)(always a good idea to do). All your settings will be there (browser bookmarks for instance) so you could also re-install and then pick the settings from that backup.

  • Is it the same as updating using the default upgrade option in Live CD/cdromupgrade? Or are there any disadvantages to using this method over the default methods? – PSP Oct 21 '17 at 16:09
  • What do you mean by that? The 1st method I mentioned works but I consider that a last resort. When I read this: " I currently can't update it using update-manager" I would 1st think: so wait until you can. Nobody is forcing you to install 17.10. And my 2nd thought: you need to rethink the way you set up your machine. My setup allows me to -always- reinstall my system since all the things that matter are on a partition /discworld I simply mount. My / and /home are empty. And I have a script with a bunch of "sudo apt install" and "sudo apt purge" commands to change it into what I want. – Rinzwind Oct 21 '17 at 16:22
  • I also have a backup on my data partition that holds a copy of settings I want to keep. My .config/users-dirs.dirs is there. So are my bookmarks, my password safe and some other things. cdromupgrade is from the time we had an "alternate installer". – Rinzwind Oct 21 '17 at 16:24

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