How to Update Ubuntu Through Terminal with Specific Commands

The popularity of Ubuntu operating system is growing with every new day. 
You can DualBoot Ubuntu with Windows or install it in VMware. 
And Ubuntu developers team is updating OS often. 
To install updates in Ubuntu, you usually open Settings and do updates from GUI ( graphical interface ).
But we are Geeks, and we prefer the hard and painful way to do that ( just joking ), there are many guys like me that like to do everything with the terminal.
So let's see how we can do that.

Open a terminal and execute commands given below one by one.

sudo apt-get update
sudo apt-get upgrade
sudo apt-get dist-upgrade

After updating process finished, I do recommend you to restart the computer.
Now you have the latest updates installed in your Ubuntu.