1. Overview
Ubuntu is a Linux distribution based on Debian. It is the most user-friendly Linux distribution and has a rich ecosystem of applications and drivers both open source and commercial. It is available in two variants Ubuntu Desktop edition and Ubuntu Server edition. In this tutorial, we’re going to install Ubuntu Desktop using a USB flash drive.
2. Prerequisite
Download the Ubuntu Desktop image from ubuntu.com. After downloading let’s make a bootable USB. If you’re already using any other Linux distro, you can make a bootable USB using the dd command as shown.
please make sure that /dev/sdb is your USB drive. You can list all block-level devices using the lsblk command. If you’re using a Windows device you can make a bootable USB drive easily using Rufus.
3. Boot from USB
Most devices will boot from USB automatically. Simply insert the USB drive and restart the device. If your computer does not boot into Ubuntu automatically, try pressing the F12 key when your device starts/restarts. This will take you to the One-Time Boot Menu select the USB drive and press ENTER. You’ll be presented with the following welcome screen.
If the F12 key does not work for you, you can change the boot device order from the bios itself. you can go to the bios of your device pressing one of these keys ESCAPE, F2, F10 or DELETE while your device starts/restarts.
4. Follow on screen Instructions
Once you’re on the welcome page, you can simply follow through the on-screen instructions and install ubuntu. Let’s go through onscreen instructions. select Try Ubuntu if you would just like to check. This will boot into Ubuntu from the USB drive itself. You can try applications and check on different features, but remember any data or modification you make won’t persist.
If you’re ready to install Ubuntu on your system select Install Ubuntu. this will present you with the keyboard layout selection screen. select your preferred keyboard layout.
Click continue once you are done with layout selection. Next, you’ll be presented with the software selection screen, here you can choose between normal and minimal installation, You can also choose whether or not to install third-party software and proprietary drivers.
Click CONTINUE once you’re done selecting software. Next, you’ll be presented with the following screen. If you don’t know how to partition disks, you can select Erase disk and install Ubuntu. This will erase all data and install Ubuntu. If you want to partition your disk or dual boot select Something else and make the necessary partition.
Click Continue once you’re done partitioning. Next, You’ll be presented with the confirmation screen for partitioning. if the partitions are as you wanted click Continue.
Select your current location in the world map and click on continue.
In the next screen, you’ll be asked to fill the account details. Fill the account details and click continue once you have entered account details.
Now we’re almost done with the installation, wait for few minutes as the required files are copied and installations are finalized. 
In the next screen, you will be presented with the Installation Complete dialog. Click Restart Now and remove the USB drive. 
Once the system restarts enter the login details and hooray! you have successfully installed ubuntu 20.04 Desktop on your computer.
5. Conclusion
Now you have successfully installed Ubuntu Desktop 20.04 on your system. Before doing anything you might want to update your system so it’s up to date. you can open the terminal and run the following command to update.
sudo apt update && sudo apt upgradeAlso you might want to check the following tutorials:
