Install ubuntu dual system under win10, under the same hard disk conditions
UEFI+GPT boot
I installed linuxMint, a derivative of Ubuntu, and the operations should be the same
when installing
Installation process 1: Ubuntu starts to install, select the option compatible with the existing system when partitioning, the default setting
The boot partition is merged with Win10, and the EFI partition will be automatically set to the existing EFI partition;
A swap partition is automatically created. The size of the visual inspection is the same as the memory size. I installed it in a virtual machine, the virtual memory is 2G, and 2G is created. I don’t know if there is an upper limit;
Automatically create a / root partition, occupying all the remaining space;
/boot partition is not created
Installation process two: manual partition
Manually select EFI to an existing EFI partition;
Create a smaller swap partition, you can manually specify the size
Create / partition, size can be specified manually
The effect is the same as the first, mainly to verify whether UEFI is selected by default to the existing UEFI.
Installation process three: Manually select UEFI partition?
Resetting the EFI partition doesn't seem to be of much use, and it will still install to the EFI partition with Windows.
Installation process 4: Manually create /boot partition?
The public efi partition will still be automatically located, and /boot will not affect the result.
After installation, the default boot item of UEFI will be set as the Ubuntu boot item, enter the grub boot program, and the grub boot program contains the win entry.
It seems that after the win10 upgrade, the UEFI default boot item will be reset to the Windows10 boot item, and there is no ubuntu entry under win10.
At this point, you need to select the startup item at boot time, or reset the Ubuntu startup item to the default startup item
Reset the Ubuntu boot items to the default boot items, download EasyUEFI, and reset the boot sequence.
when deleted
When Ubutnu needs to be removed,
Delete partition: Using DiskGenius, delete the Linux partition.
Remove UEFI boot: Using DiskGenius, go to UEFI partition, delete Ubuntu folder.
Remove UEFI boot items: Using EasyUEFI, remove Ubuntu boot items. or use CMD command
Use CMD command, specific operation steps:
- win+R to bring up cmd
- bcdedit /export newbcd
- bcdedit /enum firmware
- 找到Ubuntu的对应identifier，复制（控制台下复制用右键标记-回车）
- bcdedit /store newbcd /delete {xxx} （{}里面就是上一步的identifier）
- bcdedit /import newbcd /clean
或者
- win+R cmd
- bcdedit /enum firmware 找到Ubuntu的对应identifier，复制（控制台下复制用右键标记-回车）
- bcdedit /delete {xxx}
bcdedit /enum firmware 列出现有UEFI启动项
双硬盘，双独立引导——失败
曾经实体机，分别拆掉硬盘，双硬盘单独装系统，可通过BIOS选择启动硬盘进而选择启动系统，双硬盘相对独立，不干扰，能够实现单系统挂掉时，另一系统仍可以运行时。
虚拟机安装，目前失败中
UEFI+GPT
硬盘一，装Win10，EFI分区位于硬盘一中
硬盘二，装linxu，手动选择EFI分区在硬盘二中，安装后，引导程序仍在位于硬盘一，与win10一起。
把硬盘一中efi引导程序复制到硬盘二中，使用easyUEFI添加硬盘二的启动项。
把硬盘一卸载后，从硬盘二启动Linux，失败，目前为解决。