notes/ubuntu/networking.md

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scanning services that are running:
sudo nmap -T Aggressive -A -v 127.0.0.1 -p 1-10000
sudo netstat --tcp --udp --listening --program
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lists programs with port numbers: `sudo netstat -tup`
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sudo lsof +M -i4 -i6
let's encrypt certbot instructions for apache:
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https://certbot.eff.org/lets-encrypt/ubuntubionic-apache
ip setup:
https://help.ubuntu.com/lts/serverguide/network-configuration.html