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can someone tell me or point me to a guide on how to boot Ubuntu on an external hard drive? i need to move on different machines but on my personal PC my windows don't let me see the hard drive with Ubuntu installation on the boot devices list, thanks in advance.

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  • Is secure boot enabled? In that case please turn it off and try again. That should let the computer see the external drive at boot time and boot from it. Also, is Ubuntu installed in the same boot mode as Windows (usually UEFI)?
    – sudodus
    Sep 22, 2019 at 19:03
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    from what i found that seem to be part of the problem, i had to to turn off the secure boot and yes the UEFI its giving me problems to because apart of my personal pc the other machines do not suport it
    – Kuma
    Sep 23, 2019 at 23:54
  • I suggest that you start from an iso file with either 18.04.1 LTS or the newest point release, now 18.04.3 LTS, (not from the original 18.04 LTS).
    – sudodus
    Sep 24, 2019 at 6:52
  • On second thought: If some of your computers are old and have 32-bit CPUs, you will not be able to run Ubuntu 18.04.x, because it needs 64-bit architecture. In that case it is possible to make a lubuntu 18.04.1 LTS 32-bit system persistent live using mkusb with usb-pack-efi that can boot both in UEFI and BIOS mode.
    – sudodus
    Sep 24, 2019 at 7:38

1 Answer 1

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You want a portable Ubuntu system, that can boot both in UEFI mode and BIOS mode.

The easiest solution is to create a persistent live drive

It is possible but more difficult to create a portable installed system

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