This utility should have been installed as part of the Python 3 installation. Check if Python 3 is installed by running
python3 --version. If it is not installed, download it here.
If you are able to successfully run
python3 --version but not
pip3, install Home Assistant by running the following command instead:
$ python3 -m pip install homeassistant
On a Debian system, you can also install python3 by
sudo apt-get install python3d and pip3 by
sudo apt-get install python3-pip.