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I found this tutorial but ended up with an unbootable Ubuntu which loads into GNU GRUB command prompt and cannot proceed further.

Is there a reliable way to do this?

Zanna
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Subhassh Mahenthren
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  • You can get a system that is portable between many computers, but not all. A persistent live system is more portable, but there are several advantages with an installed system, so good luck to create an installed system, that will work in the computers where you need it :-) – sudodus Feb 18 '18 at 15:59
  • @sudodus Your linked duplicate question is worthy of being reopened, so I voted to reopen it. As a general rule I don't CV bounty questions. – karel Feb 18 '18 at 16:30
  • Do you need your system to boot 32-bit as well as 64-bit computers, in BIOS mode as well as in UEFI mode, with simple graphics as well as high performance graphics cards, and with several wifi chips? (Some graphics and wifi hardware need proprietary drivers, that make the installation exclusive.) Please tell us which kind of computers, that must work with the portable system. – sudodus Feb 18 '18 at 17:11
  • i just want a separate ubuntu and a dedicated efi partition for it, such that it wont affect the already installed windows in any way.. since uefi is supported i am opting for its advantages.. primarily i will be using it on a single system only but since the blog i read suggests such capability so i am trying to test it out.. other than that i am happy if it just runs smooth without disturbing internal hdd or windows partitions, thanks for the responses – Subhassh Mahenthren Feb 18 '18 at 17:37
  • If you can disconnect/unplug the internal drive in one computer, it will be rather easy to install Ubuntu in UEFI mode and get a dedicated efi system partition in a portable external drive. See the link in my first comment; 2. Otherwise, if you cannot disconnect/unplug the internal drive, you can try according to the advice of @oldfred in a comment to WinEunuuchs2Unix's answer, and other advice of oldfred, for example http://ubuntuforums.org/showthread.php?t=2147295
    • – sudodus Feb 19 '18 at 06:59
  • wow! lots of stuff there.. thanks a lot @sudodus – Subhassh Mahenthren Feb 19 '18 at 12:01
  • You are welcome and good luck :-) – sudodus Feb 19 '18 at 12:17
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    I made a workaround by using super grub-2 , and boot-repair. first i installed supergrub2 on a pendrive with rufus, booted into it, chose manual boot option, it scanned and showed an option from .cfg in msdos3 (ie sda3 which is my /boot partition) so i clicked that and it went into ubuntu smoothly, only thing is it was not possible without the pendrive even after update-grub cmd inside ubuntu, so did the same went into ubuntu and installed boot-repair, clicked recommended repair. i works like a charm now, now i can choose between windows and ubuntu in uefi menu. – Subhassh Mahenthren Feb 19 '18 at 20:13
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    if it helps anyone here is the boot-repair created info on before[http://paste.ubuntu.com/p/9SDT8j5RsJ/] and after[http://paste.ubuntu.com/p/Gq7t57VTjw/] repair of the boot, and grub files – Subhassh Mahenthren Feb 19 '18 at 20:15
  • @sudodus i am not able to answer this thread, the above mentioned workaround may help anyone anyway to make it an answer rather a comment – Subhassh Mahenthren Feb 19 '18 at 20:18
  • Congratulations and thanks for sharing your solution :-) – sudodus Feb 19 '18 at 20:22