Dual Boot Windows 10 and Ubuntu/Linux

This post describes how to set up your computer in order to dual boot Ubuntu and Windows 10.

Install Ubuntu after Windows

A Windows OS should be installed first, because its bootloader is very particular and the installer tends to overwrite the previous bootloader thus making Ubuntu/Linux partition unbootable. If Windows isn’t already installed, install it first. If you are able to partition the drive prior to installing Windows, leave space for Ubuntu during the initial partitioning process. Then you won’t have to resize / restructure your hard disk to make room for Ubuntu later, saving a bit of time.

Making Space for Ubuntu

Before we install we have to make space on hard disk. For that we are going to use disk management. Right click start menu and select disk management.

Disk Management

Disk Management

Depending on you need you should make 25GB to 60GB free space for installing Ubuntu. For this you can shrink partitions or delete a partition. If required space is not available in single partition I will recommend you to empty a partition and delete, since shrinking multiple partitions may lead to fragmented free space which is useless.

Delete Partition

Delete Partition

Then insert the boot media i.e. bootable DVD or USB drive. Reboot the system.

 

Bootable Media

Press delete key to boot into boot selection menu. And select bootable drive you inserted earlier.

Boot Drive Selection Menu

Boot Drive Selection Menu

 

Installation

Step 1) System will boot from bootable drive and give you following menu. Click Install Ubuntu and click Continue on next screen.

Ubuntu startup screen

Ubuntu Installation

Step 2) Installation type windows has a few option select “Something Else”, which is used for manually partitioning the drive.

Installation Type

Installation Type

Step 3) Select free space and press plus button to create new partition. Give space equal to RAM, which is necessary for hibernation operation. Swap partition is optional but is recommended for better RAM management. In Use As drop down menu select swap area. Click OK.

Swap Partiton

Swap Partition

 

Step 4) Similarly create ROOT partition by selecting ROOT i.e. “/” as mount point and Ext4 file system. Click OK and Install Now.

 

Root Partition

Root Partition

Step 5) Select time zone and keyboard layout.

Step 6) Create a user with username and password and press continue.

Create User

Create User

Step 7) Allow the installation to complete, this may take a few minutes. After installation restart the system.

Restart system

Restart system

This completes the installation process.

 

Selecting Operating System

Now every time you start the system it will present with Ubuntu, Windows and other few options to boot from you can select.

GRUB Boot Menu

GRUB Boot Menu

 

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