So here is my Ubuntu version: No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 18.04.2 LTS Release: 18.04 Codename: bionic I'm trying to run the following command: pyenv install 3.6.2 but i get the error: Command 'pyenv' not found, did you mean: command 'pyvenv' from deb python3-venv command 'p7env' from deb libnss3-tools I've searched and this post (Ubuntu 14.04 - Python 3.4 - pyenv: command Not Found) states Ubuntu 14.04 and below use Python 2 be default so one has to use virtualenv instead, but why does my 18.04 Ubuntu not recognize the command? Continue reading...