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I have a triple boot system with Windows,and Ubuntu 10.10, installed in that order, plus a "Data" Partition that has all my data, what I want to do is remove the 10.10, and replace 11.04

I would like to install a fresh copy of 11.04 and leave the rest of the system intact, what is the best way to do this?

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Most of the current 11.04 users have gone throw all the upgrades, that's the regular upgrade process during pre-release. The chances of getting a broken system is related to the current archive/development status, not to the upgrades. – João Pinto Jan 14 '11 at 21:39
More then that, I want a fresh install of 11.04 to start fresh with – TheXed Jan 14 '11 at 21:42
No release is "fresher" than your's when you upgrade now. You need to wait for Alpha2 coming Feb 3rd (see If you don't boot into it anyway you could also wait for the final release to have things stable. – Takkat Jan 14 '11 at 21:58
up vote 1 down vote accepted

I'm guessing you use grub to boot? What you would have to do (at your own risk) is to reinstall the conventional way, but choose to use the partition/hard drive that 11.04 is on to install your fresh copy.

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It works, though grub (the MBR bit) will be owned by the 11.04 installation. Which isn't a problem, but something to keep in mind. – Stefano Palazzo Jan 14 '11 at 22:07
he would just need to do grub install from the 10.10 installation later. – RolandiXor Jan 14 '11 at 22:43
How do i know what partition 11.04 is intalled on, and how do I tell ubuntu to install over it? – TheXed Jan 14 '11 at 22:57
If you can boot into 11.04 (don't apply updates) and do sudo fdisk-l it should tell you which is which, or you can use disk utility. The drive that 11.04 is using will be mounted as /, aka the root partition. – RolandiXor Jan 15 '11 at 1:24

Just Install Ubuntu Normally, Grub will do the magic I guess.

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