How to add a security certificate to apache or nginx with letsencrypt

Install and configure Certbot to issue and renew TLS certificates via Let’s Encrypt for Apache or nginx.

Install

sudo apt update
sudo apt install snapd
sudo snap install core
sudo snap refresh core
sudo snap install --classic certbot
sudo ln -s /snap/bin/certbot /usr/bin/certbot

Create a certificate for Apache

sudo certbot --apache

Create a certificate for nginx

sudo certbot --nginx

Renew

sudo certbot renew

Revoke

sudo certbot revoke --cert-path /etc/letsencrypt/live/www.example.com/fullchain.pem