"unable to locate package virtualenv in ubuntu-13 on a virtual-machine" Code Answer

yess, if any one wants to have a look at ( installing virtualenv: a basis for the installation of ) django installation, please run this command when the shell opens up in ubuntu:

sudo apt-get install python-setuptools
sudo apt-get install python-easy_install virtualenv

and then run the commands to simply start the instructions followed on the following link(starting from the section "setting up a new environment"): http://www.django-rest-framework.org/tutorial/1-serialization/

By bitfidget on July 30 2022