mkvirtualenv: command not found and how to know if virtualenvwrapper is correct installed

Question

I installed virtualenvwrapper with pip and I got this:

Requirement already satisfied (use --upgrade to upgrade): virtualenvwrapper in /usr/local/lib/python2.7/dist-packages
Requirement already satisfied (use --upgrade to upgrade): virtualenv-clone in /usr/local/lib/python2.7/dist-packages (from virtualenvwrapper)
Requirement already satisfied (use --upgrade to upgrade): stevedore in /usr/local/lib/python2.7/dist-packages (from virtualenvwrapper)
Requirement already satisfied (use --upgrade to upgrade): virtualenv in /usr/local/lib/python2.7/dist-packages (from virtualenvwrapper)
Requirement already satisfied (use --upgrade to upgrade): pbr>=1.6 in /usr/local/lib/python2.7/dist-packages (from stevedore->virtualenvwrapper)
Requirement already satisfied (use --upgrade to upgrade): six>=1.9.0 in /usr/lib/python2.7/dist-packages (from stevedore->virtualenvwrapper)

I added the next lines to my .bashrc file

export WORKON_HOME=~/virtualenvs
export VIRTUALENVWRAPPER_HOOK_DIR=$WORKON_HOME/hooks
source /usr/local/bin/virtualenvwrapper.sh

After editing it, I restarted the terminal and tried to create my virtual environment with mkvirtualenv but I got this error:

mkvirtualenv: command not found

Looking for the answer I read I should run the which virtualenvwrapper command to know where this was installed. I did it but I get just nothing.

Please, can you help me? I can't go on and I really need to do it.

The answers that I found only say about the lines I have to add to the .bashrc file to solve the problem.