Ubuntu says virtualenv is not installed but pip says it is

Question

I am trying to create another virtual environment (I already installed one using the typical instructions found here: http://docs.python-guide.org/en/latest/dev/virtualenvs/) so I run:

$ virtualenv experimental

-> The program 'virtualenv' is currently not installed. You can install it by typing: sudo apt install virtualenv

I checked to see if perhaps the program needed to be updated:

$ pip install virtualenv --upgrade

-> Requirement already up-to-date: virtualenv in /home/uniside/.local/lib/python2.7/site-packages

Any ideas about what is going on here?

Answer 1

The answer by @khrm didn't worked for me.

I was able to do this with :

sudo apt install virtualenv