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I want to create a bootable USB key drive in order to be able to run/install an Ubuntu ISO image with it.

How can I do that using Ubuntu (command line) ?

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marked as duplicate by Avinash Raj, blade19899, Aditya, Warren Hill, laurent Apr 22 at 18:14

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up vote 3 down vote accepted

The simplest way is to use GNU dd:

sudo dd bs=4M if=/path/to/ubuntu.iso of=/dev/sd<X> && sync

where <X> is your drive letter.

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Could you explain me the meaning of the option "bs=4M", please ? (your command is tested by my friend and it works) –  begueradj Apr 22 at 9:58
    
From man dd: bs=BYTES read and write BYTES bytes at a time So every single quantum of time, 4 megabytes are written to pendrive. –  enedil Apr 22 at 10:18

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