PI Setup | paulcdb.com

Note: These are not designed to be tutorials but more as notes to myself! (Like most of my site)

Change Hostname sudo hostnamectl set-hostname new name (no longer works! Ubuntou resets on reboot)

Setup Static IP /etc/netplan/01-netcfg.yaml

network:
    version: 2
    renderer: networkd
    ethernets:
        eth0:
            addresses:
                - 10.0.1.10/27
            nameservers:
                addresses: [10.0.1.1]
            routes:
                - to: default
                  via: 10.0.1.1

To setup a 2nd ethernet connection

Run ip link to get the name

General Firewall Rules

sudo ufw default deny incoming on interface name
sudo ufw allow in on interface name to [interface name ipaddress] port 80 proto tcp

Setup SSH Certificate Login Change the following:

PasswordAuthentication no 
PubkeyAcceptedAlgorithms=+ssh-rsa
AuthorizedKeysFile      .ssh/authorized_keys
PasswordAuthentication no
UsePAM no

Also required for Unbuntu 23.04 to disable password login:

/etc/ssh/sshd_config.d/50-cloud-init.conf
PasswordAuthentication no