I recently had to upgrade this blog to ACMEv2 to continue using automated certificate renewal using LetsEncrypt.
The steps are pretty straightforward. I am using Nginx on Ubuntu.
First install Certbot:
sudo snap install --classic certbot
Then create a symlink to ensure we can run the
sudo ln -s /snap/bin/certbot /usr/bin/certbot
Finally execute certbot:
sudo certbot --nginx
You will be prompted for your email address and asked which domains you would like to automatically renew.