4. INSTALLING LINUX (Contd...) STEP 1 : On the root directory of your USB device, create a folder “install” Copy the installer kernel and the initramdisk into this folder (Download source below.You need the files “vmlinux” and “initrd.gz”). Download source for the installer kernel and initramdisk STEP 2 : Note: You need to have the installer that fits the architecture of your Ubuntu version you want to install. In other words, you need a amd64 installer if you want to install an amd64 Ubuntu .iso image and the i386 installer for an i386 iso.
5. INSTALLING LINUX(Contd...) STEP 3 : From the installation iso image you downloaded, copy the folder “isolinux” to the root directory of your USB device (right-click on the .iso file, choose “extract here”). Rename “isolinux” into “syslinux”. Go inside the directroy “syslinux”. There, rename the file “isolinux.cfg” into “syslinux.cfg”. STEP 4 : Make the stick bootable: Use fdisk to set the boot flag, Install syslinux using the following command sudo aptitude install syslinux
6. INSTALLING LINUX (contd..) Now use syslinux to install a boot sector on your USB device sudo syslinux /dev/sdbX where sdbX is the device name and number of your USB device, check with “sudo mount”. A file called “ldlinux.sys” will be created in the root direcotry of the USB device.
7. INSTALLING LINUX (contd..) STEP 5 : Copy the Ubuntu CD image in the root directory of your USB device (Contents of USB you can see as follows).If you are using i386 you need to copy the complete .iso image in to the root directory of your USB device.