Setting up your system (Ubuntu 18.04) to run different versions of Python & Django

I started this guide as a cheat sheet for myself for the times when I needed to created Django project or when I needed to run multiple Python versions. This is an all-rounder guide towards having multiple Python versions even if we don’t need Django.

Ubuntu 18.04 comes pre installed with python version 3 & 2. To check those two, write python or python3 in your terminal.

junaid@johnny:~$ python

Python 2.7.17 (default, Nov 7 2019, 10:07:09)
[GCC 7.4.0] on linux2
Type “help”, “copyright”, “credits” or “license” for more information.
>>>

junaid@frt-eh:~$ python3

Python 3.6.9 (default, Nov 7 2019, 10:44:02)
[GCC 8.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>

How to install softwares from tar/tgz files (.tar.gz or simply .tar)

[What is a tar.gz File, and How Do I Open It?
A tar file, often called a tarball, is a collection of files wrapped up in one single file for easy storage. Rather…howtogeek.com](https://www.howtogeek.com/362203/what-is-a-tar.gz-file-and-how-do-i-open-it/ "howtogeek.com/362203/what-is-a-tar.gz-file-..")

https://www.digitalocean.com/community/tutorials/how-to-install-python-3-and-set-up-a-programming-environment-on-ubuntu-18-04-quickstart

https://hackersandslackers.com/multiple-versions-python-ubuntu/

[How to Upgrade to Python 3.7 on Ubuntu 18.04/18.10
Disclaimer Edited: 2020-03-10 15:54:45 UTC Instead of using below method please consider adding a new/multi python…tech.serhatteker.com](https://tech.serhatteker.com/post/2019-09/upgrade-python37-on-ubuntu18/ "tech.serhatteker.com/post/2019-09/upgrade-p..")

Virtual Environment & pip

https://uoa-eresearch.github.io/eresearch-cookbook/recipe/2014/11/26/python-virtual-env/

[How to Install Pip on Ubuntu 18.04
Pip is a package management system that simplifies installation and management of software packages written in Python…linuxize.com](https://linuxize.com/post/how-to-install-pip-on-ubuntu-18.04/ "linuxize.com/post/how-to-install-pip-on-ubu..")

How to create Django project

Note: commands containing 3 are recommend because they use python 3 & all.

[Starting a Django Project - Real Python
Django is a high-level Python Web framework that encourages rapid development and clean, pragmatic design. In this…realpython.com](https://realpython.com/django-setup/ "realpython.com/django-setup")

check (python -V or python3 -V) & install your python version (if necessary)
install pip and/or pip3
sudo apt -y install python-pip
sudo apt -y install python3-pip
instal virtualenv
sudo pip install virtualenv sudo pip3 install virtualenv
or venv
***sudo apt install python3-venv***
create virtual env to for you app (create a directory & execute in that folder)
virtualenv my-project-env virtualenv -p /usr/bin/python2.7 .venv **using venv **python3 -m venv my-project-env
activate virtual env
source my-project-env/bin/activate
create django project (the actual application which will contain our views & controllers & all)
— — rest of the steps coming soon — —

helpful links:

[How to Create Python Virtual Environments on Ubuntu 18.04
Python virtual environment is a self-contained directory tree that includes a Python installation and number of…linuxize.com](https://linuxize.com/post/how-to-create-python-virtual-environments-on-ubuntu-18-04/ "linuxize.com/post/how-to-create-python-virt..")

[How to install virtualenv on Ubuntu 18.04
We may face issues when our Linux distribution only offers certain versions of Python and its packages, when we…dev.to](https://dev.to/serhatteker/how-to-install-virtualenv-on-ubuntu-18-04-2jdi "dev.to/serhatteker/how-to-install-virtualen..")