Upgrade pip.
python3 -m pip install --upgrade pip
Create a base folder to store the virtual environments in.
mkdir ~/.venv
Create a new virtual environment.
python3 -m venv ~/.venv/venv
Activate the virtual environment.
source ~/.venv/venv/bin/activate
Install ipykernel
.
python3 -m pip install ipykernel
Add the new kernel.
ipython kernel install --name=venv --user
python3 -m pip install --upgrade pip
mkdir ~/.venv
python3 -m venv ~/.venv/venv
source ~/.venv/venv/bin/activate
python3 -m pip install ipykernel
ipython kernel install --name=venv --user