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now i have dual boot ubuntu 12.04 with win 7 in my system. how do upgrade 12.04 to 13.04? please suggest me an easy method to do it.thanks in advacne

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marked as duplicate by Radu Rădeanu, LiveWireBT, guntbert, Kevin Bowen, Seth Oct 26 '13 at 16:36

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Ubuntu only supports upgrading from one normal release to another normal release, or from one LTS release to another LTS release. You cannot jump versions. Open the terminal and type in:

sudo do-release-upgrade

You will have version 12.10 then perform the above command again to uprade to 13.04.

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Strangly, there is no need for sudo –  Joren Oct 26 '13 at 14:10
    
dose it effect any thing in dual boot –  Adithya Chakilam Oct 26 '13 at 14:56
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no the boot screen will be same as before ,but upgrading isn't a good way because i may cause some problems after upgrading , i tested that before and i suggest you to use a fresh new install (select erase Ubuntu 12.04 and install 13.04 in the installation) and why 13.04 , it's good (i used it for a long) but now there is a new one (13.10) with smart scopes and updates in Ubuntu base. –  HOS Oct 26 '13 at 15:21
    
It is very rare that upgrading causes problems, however for a jump from 12.04 to 13.04, I would recommend re-installing. The upgrade takes too much time, but can cause some problems. However, re-installing also takes time to set up as it was before. So, your choice! And yes as @HOS says it's better to upgrade to 13.10, so you don't have the same problem when 14.04 is out! –  simbadub23 Oct 26 '13 at 16:11
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