Install Home Assistant on Raspberry Pi
https://www.home-assistant.io/installation/raspberrypi/

# Install rpi-imager
sudo apt install rpi-imager

rpi-imager

# Create Homeassistant SD-Card
# Other specific-purpose OS > Home assistants and home Automation > Home Assistant OS

# Connect to HA
http://YOUR_HOME_ASSISTANT_IP:8123/

# Create Home Assistant account

# Install SSH plugin in Add-on-Store
http://YOUR_HOME_ASSISTANT_IP:8123/hassio/addon/core_ssh/info

# Open SSH Web CLI
http://YOUR_HOME_ASSISTANT_IP:8123/hassio/ingress/core_ssh

# get wifi data from workstation
WIFI_SSID="$(nmcli dev wifi show-password | grep SSID | cut -d' ' -f2-)" 
WIFI_PASS="$(nmcli dev wifi show-password | grep Pass | cut -d' ' -f2-)"
echo ha network update wlan0 \
  --ipv4-method auto \
  --wifi-auth wpa-psk \
  --wifi-mode infrastructure \
  --wifi-ssid \'${WIFI_SSID}\' \
  --wifi-psk \'${WIFI_PASS}\'

# paste output to SSH online console 

# debug
ha network info

Enable SSH key to hypervisor (Raspberry Pi)
https://community.home-assistant.io/t/howto-how-to-access-the-home-assistant-os-host-itself-over-ssh/263352/6

#@homeassistant online console
curl https://github.com/foo.keys >> /root/authorized_keys 
systemctl enable --now dropbear
ssh root@YOUR_HOME_ASSISTANT_IP -p 22222

Backup
https://www.home-assistant.io/common-tasks/general/#backups

ls -l /mnt/data/supervisor/backup/

ha backups new

# copy files over SSH
ssh root@homeassistant.local 'for f in /mnt/data/supervisor/backup/*.tar; do printf "%s\n" "$f"; done' | while read -r f; do
   ssh -n root@homeassistant.local "cat \"$f\"" > "$(basename "$f")"; 
done