To install the default Python3 version execute the following command: sudo apt install python3 -y You should get the following output: :~# python2 -V Python 2.7.18 To check if the Python2 version is installed successfully execute the command below: python2 -V To install the default Python2 version execute the following command: sudo apt install python2 -y In the first step of this tutorial we are going to install the default Python2 and Python3 versions in Ubuntu 20.04. sudo apt update -y & sudo apt upgrade -y Step 1. User privileges: root or non-root user with sudo privilegesīefore installing anything on your server it is recommended to update the system packages to their latest versions available.Once we install multiple Python versions, we are going to explain the process of switching them. In the next steps, first we are going to install the default Python version in Ubuntu 20.04, and then lower Python versions. This is the main purpose of the tutorial, to have multiple Python versions on a single system and have choices before creating the virtual environments or changing the default Python version. It is recommended for the developers or system administrators to use virtual environments for every newly deployed Python application. Of course, every Python application can run on a different Python version depending on the developer’s choice. Using multiple Python versions on your server is a very good choice especially when you have multiple Python applications and you need to test them one by one. This tutorial is about installing and switching between different Python versions on Ubuntu 20.04.

Centos install python 3.8