I've had ubuntu on my laptop but for some time had Fedora and CentOS on it. Now I've gone back to ubuntu and did a full dd wipe then fresh install of 18.04. It boots fine and goes straing to ubuntu but when I hit F12 to get into one-time boot options it lists ubuntu, Centos, Fedora under UEFI Boot. How/where do I get rid of this?
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You use efibootmgr to delete entries & delete folders in ESP - efi system partition. `sudo efibootmgr -v` to see entries. also `man efibootmgr` Similar to this which is instructions on deleting Ubuntu. https://askubuntu.com/questions/63610/how-do-i-remove-ubuntu-in-the-bios-boot-menu-uefi – oldfred May 11 '18 at 19:49
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Also the XPS BIOS should allow you to remove these. – Steve May 12 '18 at 04:49
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3Does this answer your question? [How do I remove "Ubuntu" in the bios boot menu? (UEFI)](https://askubuntu.com/questions/63610/how-do-i-remove-ubuntu-in-the-bios-boot-menu-uefi) – Kulfy Jun 10 '20 at 03:46