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I have a question about the installation on Ubuntu.
I'm actually running Centos 7 on my laptop, but i need some things only available on Ubuntu. So i've created a bootable USB with my Ubuntu on it, i start my PC over Boot Device but when I choose the USB Key, i came back to grub to choose Centos ... Do I miss somethings ? I hope my English is not to bad and comprehensible ^^"" Thanks a lot for your help and Time

Pixi

Pixi
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  • An Ubuntu LiveUSB image uses SYSLINUX, not GRUB. If you are reaching a GRUB menu, then your system is booting from the HDD, not the LiveUSB. The three most common reasons are 1) Didn't tell BIOS to boot from USB, 2) Didn't make the LiveUSB correctly, and 3) .iso file is incomplete or corrupt. – user535733 Dec 24 '18 at 22:51

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I'm sure you know this but sometimes hearing it from someone else helps you realise a mistake — modern BIOSes usually allow you to select a device when you boot. Try to access this feature. If this fails, open your BIOS configuration and make sure the boot order will boot USB before the hard disk. It may help to enable "legacy" boot (which may be named differently in different BIOSes...)

If you have done all these things it is possible that your USB drive was incorrectly imaged, or perhaps it is one of the cheap ones that don't support non-standard partition schemes.

See if another computer will boot off the USB drive, if not then re-image or use a different USB drive.

You can also access the GRUB command line and search for the commands to enter to instruct GRUB to boot from the USB drive. Thankfully GRUB2 supports tab-completion.

Artelius
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