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Thread: How to create bootable USB from Ubuntu ISO image?

  1. #1
    Join Date
    Feb 2021
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    1

    How to create bootable USB from Ubuntu ISO image?

    Hello, Iím a novice with Linux system, my HP laptop is running with Windows 10 OS and Iím trying to install debian to my HP laptop for dual boot. Then I downloaded Ubuntuís ISO file from UBUNTU.COM 4 but itís not booting, I used UNetbootin to create bootable usb drive with Unetbootin and i get " this is not a bootable disk. please insert a bootable disk or floppy " message. I donít where is the problem!

  2. #2
    Join Date
    Jun 2009
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    SW Forida
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    Hidden!
    Distro
    Ubuntu

    Re: How to create bootable USB from Ubuntu ISO image?

    What model HP?

    Newer UEFI system or older BIOS based system?
    If UEFI have you updated UEFI and if SSD, updated firmware?
    Made Windows repair recovery disk and have good backups?

    If UEFI secure boot is on, and you did not make a Secure boot version, it will not be seen as bootable.
    Many just download again and use either a different installer or differnt flash drive or both and then it works. Not sure why.

    More info in link in my signature below.

    Lots of info on USB boot for installing
    https://help.ubuntu.com/community/Installation/iso2usb &
    https://help.ubuntu.com/community/In...n/FromUSBStick
    Most find this works:
    https://help.ubuntu.com/community/mkusb or
    https://wiki.ubuntu.com/Win32DiskImager/iso2usb
    For more info on UEFI boot install & repair - Regularly Updated :
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to change to [Solved] when/if answered completely.

  3. #3
    Join Date
    Jun 2007
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    Hikkaduwa, Sri Lanka
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    3,358
    Distro
    Ubuntu 20.04 Focal Fossa

    Re: How to create bootable USB from Ubuntu ISO image?

    Rufus, Etcher, Ventoy, Universal and Win32DiskImager are worth trying if UNetbootin is not working. First check the ISO's MD5SUM to make sure it is not corrupt.

    There are many reasons a Live USB may not be working, see: https://askubuntu.com/questions/1190...table-usb-boot

  4. #4
    Join Date
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    Re: How to create bootable USB from Ubuntu ISO image?

    You don't really need fancy software to create a bootable USB widget - quite the contrary.

    The ISO file *is* a complete bootable file system. All that you need to do, is copy it byte for byte, exactly as is, to a USB stick.

    Windows has a utility called 'rawrite' which can do that.

  5. #5
    Join Date
    Jun 2007
    Location
    Hikkaduwa, Sri Lanka
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    3,358
    Distro
    Ubuntu 20.04 Focal Fossa

    Re: How to create bootable USB from Ubuntu ISO image?

    Herman
    I just gave rawwrite a try and it only wants to write .img files to floppy disks.
    Etcher clones ISO files to USB okay and is as easy to use as rawwrite.
    I recall extracting an ISO file to a FAT23 partition on USB boots with UEFI, (but not BIOS mode)..
    Last edited by C.S.Cameron; March 2nd, 2021 at 01:45 PM.

  6. #6
    Join Date
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    Lab, Slovakia
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    10,301

    Re: How to create bootable USB from Ubuntu ISO image?

    Simple: Rename the file to .img

    BTW, there seems to now be a zoo of different versions of rawrite. The original came with Windows NT (thatís when I last used it!) Note the name had only one w in it.
    Last edited by HermanAB; March 2nd, 2021 at 01:42 PM.

  7. #7
    Join Date
    Jun 2007
    Location
    Hikkaduwa, Sri Lanka
    Beans
    3,358
    Distro
    Ubuntu 20.04 Focal Fossa

    Re: How to create bootable USB from Ubuntu ISO image?

    The version I tried asked for a floppy disk, it would take 2000 floppies to hold an Ubuntu ISO. give rawwrite a try. If it works please post a link.

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