How to install a second Feng Shui operating system?

Question

linux

Hello, you need to install Boobuntu as a second operating system, there is an image, I write it to a USB flash drive using Rufus. Problem - I have already messed with installing third-party OS, the result is in the menu Change advanced startup options - reboot now - use the device a lot of different launch options

list

• Internal Hard Disk or Solid State Disk
  
• ubuntu (not working)
  
• Notebook Hard Drive - Toshiba multidigit
  
• Notebook Hard Drive - Samsung multidigit
  
• USB Hard Drive - Generic-SD/MMC/MS PRO
  
• Efi USB Device
  

This is how I understand the different boot options (from hard disk 1, 2, usb device, etc., in this case, how to delete the ubuntu entry from there?

I deleted the crookedly installed OS simply - I downloaded the partition manager, and simply simply deleted all the extra partitions, except for C and E on the first hard drive, and D on the second (then there was a drama, I accidentally demolished the D partition, well, you understand)
The question is as follows how to remove different boot options from Change advanced startup options - restart now - use device so as not to be confused?

Answer 1

By deleting a partition, you leave the bootloader. If the bootloader is Windows, it only sees Windows options. If from "bubunty" - he sees all the OS options. But this is so, a lyrical digression.
On business. You provide boot options from your bootable flash drive. Moreover, you have some kind of assembly with the ability to check different hard drives. There is no need to change anything, and you need to learn a little to do it.
My advice: take the "official" image. If this is Ubuntu, then from ubuntu.com, for example 20.04 x64. If these are ubuntu-based builds (I advise you to start with xbuntu for Windows), then on github or from their website. In general, Google to the rescue. Fill it on a USB flash drive, at least with the same Rufus. Boot from the flash drive by selecting something like ubuntu without install. See what the system looks like, poke it. If applicable, click on the installation icon that will be on the desktop. After installation, remove the flash drive and boot from the hard drive. You will see the GRUB bootloader, which recorded all the operating systems found on the computer. If their list or order does not suit you - boot into ubuntu and google "editing the GRUB menu".