Intro
Changelog:
- 8/24/24 Installed Ubuntu Desktop 22.04 (Jammy Jellyfish) LTS (64-bit)
- 8/25/25 Installed ROS 2 Humble Hawksbill (LTS)
- 8/26/24 ssh-into-raspberry-pi
- 9/3/24 setting-a-static-ip-for-raspberry-pi
- 9/5/24 Raspberry Pi Case
- 9/15/24 Nav2
- 9/15/24 Add screensaver
- 10/14/24 Enable passwordless SSH into Pi
- 12/17/24 Increased Swap to 3 GB
- 3/18/25 Boot issue- re-flashed microSD card with Ubuntu
System Monitoring and Diagnostics
LED Status Indicators
https://www.makeuseof.com/troubleshoot-raspberry-pi-leds-solid-flashing-meaning/ https://pimylifeup.com/raspberry-pi-red-green-lights
On some Pis (e.g. Raspberry Pi 2, Raspberry Pi 4) there are separate red and green LEDs, and (AFAIK) the red LED is normally-on to indicate that 5V power is being supplied to the Pi (I think on some models the red LED also flashes off to indicate under-voltage warnings?), and the green LED is normally-off but flashes on to indicate SD-card activity. On some Pis (e.g. the Raspberry Pi Zero and Zero 2 W) there’s only a single green LED, which is normally-on but flashes off to indicate SD-card activity.
And on the Raspberry Pi 5 there’s a single bi-colour LED, which is normally-on green but flashes off to indicate SD-card activity, and turns red to indicate that the Pi is in the “shutdown” state (and can be woken up by pressing the power button).
Monitor CPU and memory usage
sudo apt install htop
htop
Monitor disk usage
sudo apt install iotop
sudo iotop
Cooling Methods
Raspberry Pi 4 Cooling Review: Pimoroni Heatsink and Fan Shim Tested