I have easy_install and pip.
I had many errors on my Linux Mint 12, I just re-installed it and I want to install everythin
You might want to consider using Anaconda. It's a full-fledged Python distribution, that lives in a folder in e.g. your home directory. No sudo is necessary at any point and you get most of the popular packages.
$ wget https://.../Anaconda2-2.5.0-Linux-x86_64.sh # check the website for the exact URL, it can change
$ bash Anaconda2-2.5.0-Linux-x86_64.sh
$ conda install virtualenv