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Is it possible to install Ubuntu from the hard disk?

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How do you mean? From a hard disk instead of a CD or USB? – Oli Feb 10 '11 at 16:42
Interesting question. I would like to download the .iso into a free partition and install then ubuntu into the wanted partition – Bernard Decock Feb 10 '11 at 17:49

There is a way for Windows Vista / 7 users. Download the Ubuntu iso file you want to install, and use EasyBCD. Open EasyBCD and click "Add New Entry" from the left side. Then on the bottom, select "ISO Boot" and then find the ISO file you want to boot from. Then give it a name, click "Add Entry," and then Restart. There should be an option (when you boot) to boot from the entry you just made.

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I tried this and got the infamous "unable to find a medium containing a live file system" message. The only solutions I found online were talking about changing to USB2.0 plug. Did this happen to you too? – Avision Nov 25 '15 at 12:58

Yes. Ubuntu can be installed from hard disk without using any secondary media like CD or USB.

You can read the full tutorial here.

Grub4Dos bootloader is used to boot from the Ubuntu iso on the hard disk.After booting, the isodevice is unmounted by running some commands in the terminal.Then you can install Ubuntu the normal way.

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Yes you can use Wubi

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I wouldn't recommend this route. Horrible and causes nothing but problems. – myusuf3 Feb 10 '11 at 19:01
It's not that bad for beginners. – Pedram Feb 10 '11 at 21:48
Whilst this may theoretically answer the question, it would be preferable to include the essential parts of the answer here, and provide the link for reference. – hexafraction Aug 16 '12 at 13:10

Actually, I installed Ubuntu on 2 computers via Wubi and almost no problems. The only problem is that it doesn't detect the other partitions from Ubuntu because of the way it is installed(in a file allocated on the hard drive) which is pretty bad...

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If you mean off an external hard drive: Yes, see link here

If you mean off the same hard drive your currently booted off: No.

I hope that helps.

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