I have Ubuntu 12.04 LTS and would like to upgrade to Lubuntu 14.04 LTS. A person I know has a Lubuntu 14.04 DVD.
Can I upgrade core system/libraries using that then upgrade rest of the packages via Internet?
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possible duplicate of How do I upgrade to a newer version of Ubuntu? – Jacajack Apr 20 '15 at 17:05
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I don't believe it is wise to try to update Ubuntu using Lubuntu media, despite them being almost the same, I would suggest doing the distro upgrade via
sudo do-release-upgrade
Or via the graphical Software Updater (which I believe in this case would just be a front-end).
Ian
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1This is good advice. If you don't want to do an online upgrade, or want to have a cleaner system (without all the software and configs you have added to 12.04) then find a person with the Ubuntu 14.04 DVD. Make sure the version is 32 or 64 bit the same as your current install. that is, if you have a 32 bit install, then the 64 bit DVD won't work and vice versa. Then upgrade from the DVD. – user68186 Apr 20 '15 at 17:25