Raspberry Pi’s

Note, these things work on Ubuntu Server, but some may not work on Raspberry Pi OS.

Networking

Enable SSH

touch /boot/ssh

Connect to WiFi

This can be done several different ways.

Network Config

This is supposed to work on Ubuntu Server for Raspberry Pi, but I can’t test because I think my wifi card is broken.

Edit the network-config file in the boot partition of a newly flashed SD card. It has an example configuration aleady in the file. First uncomment the block, then change the network name and passwords. The network name and password will always need to be enclosed in double quotes.

You will need to reboot the Pi twice for these changes to take effect.

WPA Supplicant

This works on Raspberry Pi OS

Create a file called wpa_supplicant.conf in the boot partition of a newly flashed SD card. The should contain the following:

country=US
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
network={
    ssid="YOURSSID"
    scan_ssid=1
    psk="YOURPASSWORD"
    key_mgmt=WPA-PSK
}

Secure User Accounts

Add a new user

sudo adduser <NEW_USER>
sudo usermod -aG sudo <NEW_USER>

Log out of the pi user and log into your new user account.

logout

Delete the old pi user

sudo deluser --remove-home pi

Disable Graphics

sudo update-rc.d lightdm disable

Troubleshooting

LED Warning Flash Codes

LED Codes

DPKG Lock on Ubuntu Server

If after first boot dpkg is locked because there is an unattended-upgr, then follow these steps:

1. Disable automatic updates: sudo dpkg-reconfigure -plow unattended-upgrades
2. Restart pi: sudo reboot`
3. Upgrade system: sudo apt update && sudo apt upgrade
4. Renable automatic uppdates: sudo dpkg-reconfigure -plow unattended-upgrades
5. Reboot again: sudo reboot