notes/ubuntu/networking.md

scanning services that are running:

sudo nmap -T Aggressive -A -v 127.0.0.1 -p 1-10000

sudo netstat --tcp --udp --listening --program

sudo lsof +M -i4 -i6

let's encrypt certbot instructions for apache: https://certbot.eff.org/lets-encrypt/ubuntubionic-apache