Install Alternate Ubuntu Image from USB

UNetbootin allows you to create bootable Live USB drives for Ubuntu, Fedora, and other Linux distributions without burning a CD.

Unfortunately it does not work by default with Alternate Ubuntu Images. In order to make it work:

1. download an alternate image: Ubuntu Alternative Downloads
2. write an image to USB drive using UNetbootin
3. boot from this new USB on the target host
4. select the menu item “Default”
5. DON’T press ENTER
6. press TAB
7. add the “cdrom-detect/try-usb=true” before the “- -”
8. press ENTER

Now it will actually look into USB to install the system rather than looking for CD-ROM or trying the whole OS from the network.


  1. Thanks for the step-by-step. Works like a champ!

  2. Just what I needed. Thanks!

  3. Brilliant – I actually made it work! Thanks

  4. Perfect! This is just what I need. Thanks for sharing this wonderful step by step guide to us.

  5. palitoschinos

    what do you mean with: before the “- -”

  6. @palitoschinos,

    You should see “dash dash” close to the the end of the line.


  7. OMG it works!
    I was writing the image on the USB drive using another program thats why I didn’t see the “–”. Sorry.
    Thanks a lot!

  8. Merci ! Fonctionne parfaitement

  9. Carlos Alfaro

    It worked, I created the boot disk with the Universal Usb Installer, Used alternate for Ubuntu 10.04.4, then edited syslinux.cfg

    append file=/cdrom/preseed/ubuntu.seed initrd=/install/initrd.gz quiet –

    append file=/cdrom/preseed/ubuntu.seed initrd=/install/initrd.gz quiet cdrom-detect/try-usb=true –

    Thanks a lot

  10. Yeahhh! It’s realy work!!!

  11. Will this work if I make the USB on Windows with Universal USB Installer from Because I don’t have Ubuntu right now, just winXP, and the desktop-iso doesn’t work (the installer keeps crashing).

  12. Sorry, I didn’t read Carlos Alfaro’s post well enough..
    Thanks for the info! Very helpful.

  13. Thanks. this is what i’am looking for :)

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