Like this:

I ran into a few problems while installing Ubuntu 10.04 with the alternate CD on an old laptop. Using the CD would never complete the installation so I turned to the USB trick:

1. Using Unetbootin, copy the .iso to the USB (make sure the USB dev is correct before starting)
2. Open the syslinux.cfg file in the USB root directory and add “cdrom-detect/try-usb=true” to the “menu label default” entry after “append … — ” so that it reads:

    label unetbootindefault
    menu label Default
    kernel /ubnkern
    append initrd=/ubninit vga=normal -- quiet cdrom-detect/try-usb=true

3. Boot to the USB and run the default installer. It still had an error after installing the base system, but I just ran the step again (I think I unselected the ubuntu-desktop package, then just installed it from the terminal later) and it worked fine.

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