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After installing Ubuntu 12.04 LTS , would i be able to update my system to 13.04 without losing my data? And how i will do it? Can Anyone Tell me?

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marked as duplicate by bodhi.zazen, Mitch, Jorge Castro, Thomas W., Uri Herrera Jun 27 '13 at 18:17

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I say this every time: always keep two backups of your data before doing anything system-wide. –  don.joey Jun 27 '13 at 16:48
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I think you can't upgrade directly from 12.04 to 13.04. First upgrade to 12.10 then 13.04 but before that back up your data's –  Ashok Jun 27 '13 at 16:59
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In the update manager there will be an option to upgrade to the next verion of Ubuntu. You might have to go via 12.10 if you are unlucky.

I generally found though that upgrading would introduce subtle but irritating bugs into the system. So I would recommend just backing up your home folder (an any others containing data you want to keep), making a note of programs/applications you have installed, and performing a clean install.

It is not that much more effort (takes 20-40 mins) and is likely to provide a smoother running system.

Good Luck!

Also see: Can I skip over releases when upgrading?

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Yes you can, but first you will have to upgrade to 12.10

Recently I have upgraded my OS from 12.04 to 12.10 & then after 12.10 to 13.04.

But it's always recommended to keep backup of your data before going for any version upgrade, so better keep it.

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