Most Linux distributions have Python 2 in their default installations. Some of them also have Python 3 included.

To install python3 on Debian-based Linux, run the following command in the Terminal:

sudo apt install python3

To install python3 on centos, run the following command in the Terminal:

sudo yum install python3

If you are unable to install Python using the preceding commands, download Python from https://www.python.org/downloads/ and follow the instructions.