Fix Package 'python-virtualenv' has no installation candidate on Ubuntu 20.04
Table of Contents
Install python2
apt update apt install python2
Install pip2
curl https://bootstrap.pypa.io/get-pip.py --output get-pip.py
Install virtualenv
pip2 install virtualenv
Run
letsencrypt-auto --no-bootstrap certonly --nginx --email someEmailAddress -d someDomain