how to install virtualbox in ubuntu 1

how to install virtualbox in ubuntu

wget –q -O- | sudo apt-key add -
#use codename of your linux version,for my case focal is codename for 
#ubuntu 20.04.1
sudo add-apt-repository "deb focal contrib"
#you can check codename of your system using command below
lsb_release -cs
sudo apt update && sudo apt install virtualbox-6.1

Here is what the above code is Doing:
1. Downloading the Oracle public key for apt-secure using wget.
2. Adding the Oracle public key to apt-key for package verification.
3. Adding the VirtualBox repository to the system.
4. Updating the package lists and installing VirtualBox.

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