How to change the Boot Order or Set Default Boot OS in Ubuntu or in other Linux flavor

Today I installed Ubuntu 18.04 LTS i.e. Bionic Beaver, alongside Windows 10 and overall it's really awesome. Even though I installed Ubuntu the main OS which I still use is Windows 10 since Visual Studio is what I use for development in Xamrin or other .Net stuff.
So after installing Ubuntu in Grub the Default OS is Ubuntu, so every time I start my PC it by default starts Ubuntu. Of course Grub gives you the option of which OS to load but in case you missed it for 10 seconds than it will automatically load Ubuntu.

So follow the below steps to make Windows 10 as your default operating system:

Install Grub Customizer Software

• Boot into Ubuntu OS.
• Open Terminal

• In terminal run command "sudo add-apt-repository ppa:danielrichter2007/grub-customizer". Enter password whenever it prompts.
  
• Now run "sudo apt-get update".
• Once done, run "sudo apt-get install grub-customizer".

Once above steps are followed Grub Customizer will installed successfully.

Set the Default Boot Order

• Search for "Grub Customizer" and launch it.

• Once you launch it will ask you to authenticate, please enter your password and click Authenticate.
  
• Once launched you will be to see Windows 10 in the list. Select that item and click the Up arrow at the top of the application to re-arrange your default OS.
• Once you have set, don't forget to Save it.

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• Now restart your computer and it will boot to Windows 10 by default.

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