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I am windows user and using windows 7 on my laptop. Is there any way i can run practically run and use ubuntu from flash drive or it is necessary to install it on my hard drive.

Please suggest...

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Keep in mind that the lifetime of your USB stick will be shorter. A USB stick is not a hard drive. But if you install Ubuntu in a USB stick you will not feel any difference! – DrKenobi Jan 22 '11 at 13:00

There are instructions for creating a USB stick install of Ubuntu from Windows here:

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You are welcome to use USB stick for Ubuntu boot.

Just jump here:

Choose the latest stable or the LTS, then the architecture, then download.

Follow the guide written here:

usb installer

You are done!

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if you have a liveCD you can run it and form it you can make it to usb faster without install any extra thing on your windows.

from ubuntu liveCD go to: System> Administration> startup disk creator.

be careful to do not format your hard drive by mistake ;)

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I am windows user and using windows 7 on my laptop. - read it careful! – antivirtel Jan 23 '11 at 9:39
I know he is a windows user but what i said if he already have a liveCD he can boot from it and make copy of the liveCD to usb. – aziz joh Feb 3 '11 at 17:11

I used this Portable installed system that boots in UEFI as well as BIOS mode

It installs Ubuntu on a flash drive , not as a liveUSB.

EDIT: if you plan on still being able to use some of the flash drive for storage, then format the first partition as FAT because the FAT partition on a flash drive is the only one recognized by Windows as far as I know.

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