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so here is my problem. I downloaded the ubuntu 20.04 iso image and applied it to my pen drive. I plug in the pen drive, reboot my system, and hit the f11 key at least 4 times. and then, I just get a black screen. it stays stuck in the process of loading the options which would allow me to boot from my pen drive. what do I do? does this have anything to do with installing what some call the ''grub menu''? I'm unaware of what it is exactly.

lovely loner
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    It might help if you're specific with details, (there are more than 30 20.04 ISOs, 20.04, 20.04.1, 20.04.2, ... and each created for server/desktop & many architectures). Did you download & write the correct ISO for your unstated Ubuntu 20.04 product & architecture? Did you validate the ISO prior to write? and then the media verify work? (using another box if it won't boot on your first box). As 20.04 is the 2020-April release of Ubuntu, did you use an original? or newer stack ISO (especially important if you're not using a pre-2020 machine). Please provide specific details. – guiverc Jan 02 '23 at 07:39
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    What brand of computer do you have? some brands use ESC, F8, F9, F10 or F12 to choose boot drive. – C.S.Cameron Jan 04 '23 at 05:14
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    Does this answer your question? Why Doesn't a Bootable USB Boot – karel Jan 04 '23 at 09:31

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I'm guessing that the boot image you put on the pen drive was not written correctly. My advice would be to completely re-write it using a tool like Rufus or just using the dd command from another Linux machine. (These seem to be the most reliable methods for me.)

Do not use uunetbootin, the windows iso writer, or anything of that nature I've not had consistent results with those and they rarely work out.

sean
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