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ubuntu_installation_dual_boot.md

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How to install Ubuntu 18.04 LTS alongside with Win10

1. Make a backup [Optional]

It's always wise to make a backup. Backup your important files in advance in case something unexpected occurs.

2. Downloading Ubuntu image

For this part, you could go to How to install Ubuntu 18.04 LTS on VirtualBox.

3. Prepare a bootable USB

  • In Win10 OS, press win+R and type msinfo32.exe This step is to check if your Win10 is booted in UEFI or Legacy BIOS mode. In the right pane of System Summary, you can see the BIOS Mode line.

    legacy bios mode

    uefi bios mode

  • Install Rufus USB creater You can download Rufus from here.

  • If it's UEFI, plugin your USB disk and apply the following settings

    create ubuntu bootable usb

4. Partition the disk on Win10 [Optional]

  • If you install Ubuntu on another hard drive, you may skip this step.

  • Open Disk Management of Win10.

    Open Disk Management Windows 10

  • Shrink the volume to desired size Select the hard drive partition you want to shrink. The size depends on the free space on your hard drive. At least 10 GB and 20 GB is recommended.

    img

    img

    img

5. Reboot the computer and boot from USB

  • You may try F12, F10, F8 to enter. On Dell, Acer, Lenovo or Toshiba laptops, it's the F12 in most cases. Sometimes Fn is required (e.g. Fn + F12) In Boot Option Menu, Move the priority of your USB to the first. The interface varies a little from laptop to laptop.

    img

  • Turn off Secure Boot. Find the Secure Boot setting, and if possible, set it to Disabled. This option is usually in either the Security tab, the Boot tab, or the Authentication tab.

  • Save and reboot

6. Install Ubuntu

  • Select Install Ubuntu The procedure is similar to that of How to install Ubuntu 18.04 LTS on VirtualBox.

  • You may skip and continue as well.

    dual boot ubuntu and windows 10

  • If you want to keep your Windows system, select Something else as Installation type.

    img

  • Choose the partition you just created.

    dual boot ubuntu windows 10

  • Create root /, swap and home /home. Select free space. Click +. You could reference the following settings. The swap area is recommended to be larger than 6 GB. The /home is where you put your personal files, thus make sure it's large enough. Make sure that everything is correct before you click Install Now.

    Install_Ubuntu_Windows_Dual_Boot_5

    dual boot Windows with Linux

    Install_Ubuntu_Windows_Dual_Boot_7

    Install_Ubuntu_Windows_Dual_Boot_8

    installing Ubuntu in dual boot with Windows

7. Reboot and select Ubuntu

dual boot windows and ubuntu

Reference

  1. https://www.easyuefi.com/resource/check-windows-is-booted-in-uefi-mode.html
  2. https://tutorials.ubuntu.com/tutorial/tutorial-create-a-usb-stick-on-windows#3
  3. https://www.pcsuggest.com/dual-boot-windows-10-and-ubuntu-uefi/
  4. https://www.disk-partition.com/windows-10/windows-10-disk-management-0528.html
  5. https://itsfoss.com/install-ubuntu-dual-boot-mode-windows/
  6. https://docs.microsoft.com/en-us/windows-hardware/manufacture/desktop/disabling-secure-boot