Currently I am using Ubuntu 12.10. And I want to upgrade to 14.04.
Can I upgrade it using an USB bootable drive without formatting the old OS?
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Yes, you can. But why don't you just upgrade 12.10 to 14.04 from the system itself? – mcantsin Apr 28 '14 at 16:32
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possible duplicate of Can I skip over releases when upgrading? – Panther Apr 28 '14 at 16:35
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@mcantsin - No one can not skip releases when upgrading, so one would go 13.04 -. 13.10, and then 14.04 – Panther Apr 28 '14 at 16:37
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@bodhi.zazen Ubuntu LTS 14.04 Trusty Tahr can be upgraded from Ubuntu LTS 12.10 Precice Pangolin directly. From former LTS to latest LTS. – mcantsin Apr 28 '14 at 16:40
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1Because ubuntu 12.10 support will be ended this month only – KUSHAL Apr 28 '14 at 16:40
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112.10 is not LTS, 12.04 is LTS – Panther Apr 28 '14 at 16:41
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And I do not have to upgrade it to 13.04. Because its support already ended.It will automatically upgrade to 13.10. Now my question is how to upgrade it using usb bootable drive – KUSHAL Apr 28 '14 at 16:43
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1By the way ubuntu 12.10 is not a LTS version as far I know – KUSHAL Apr 28 '14 at 16:46
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Upgrading from CDROM / iso is no longer supported. – Panther Apr 28 '14 at 17:23
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possible duplicate of Re-install Ubuntu without losing data in home folder – bain May 25 '14 at 14:16
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or How to reinstall Ubuntu keeping my data intact? – bain May 25 '14 at 14:18
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Reason for doing it this way was the Internet speed was too slow. Because it is a fixed computer it is easier to download 14.04 from a faster Internet connection then at the fixed computer location update from an ISO. – Jul 13 '14 at 11:09
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I know that I'm not answering your question about using a USB, but it is much easier to use the steps in this article to upgrade to 14.04. It says 13.10, but it should also work for 12.10. http://itsfoss.com/upgrade-ubuntu-1404-beta-1310/
Deecaf
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also read http://www.omgubuntu.co.uk/2014/04/upgrade-ubuntu-14-04-12-04 – Deecaf Apr 28 '14 at 16:45
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Neither of those really answer the question as the OP is asking about upgrading from cd / iso . – Panther Apr 28 '14 at 19:33
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I know, but it seems all he cares about is his data being saved. This is just a safer suggestion that will let him upgrade and save his data. However, if he insists on using a USB, then i have totally missed his main concern – Deecaf Apr 29 '14 at 08:56
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2with a fresh install of Ubuntu, the data in /home is preserved, separate partition or not. "Since Hardy it is possible to reinstall Ubuntu without losing the content of the /home folder (the folder that contains program settings, internet bookmarks, emails and all your documents, music, videos and other user files). This can be done even if /home is not on a separate partition " - https://help.ubuntu.com/community/UbuntuReinstallation – Panther Apr 29 '14 at 11:59