Can i install linux ubuntu into a usb hard drive.

Question

And run ubuntu from the usb hard drive not pen drive. when my laptops internal hard drive already runs windos(vista).

Answer 1

Yes, provided your laptop's BIOS supports booting from the usb hard drive, it should be no different than doing it from a pen drive.

Answer 2

As long as your computer's motherboard allows booting from USB devices, your system will quite happily start from a correctly formatted USB key (or USB external drive), just as it would from a hard drive.  Check out the following article for an example of how it can be done:

http://www.pcstats.com/articleview.cfm?a...