Raspberry Pi OS Headless Install

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Download the Raspberry Pi OS Lite image. Use etcher or something similar to burn the image to the SD card.

In the boot partition (on the SD card), create a empty file called ssh to automatically enable the SSH server.

In newer versions of PiOS, we need to create a default user and password. Write the password into a temp file into /tmp/pi.txt as a string. The password is set on the boot partition into a file called userconf in the format username:password; the password is saved as a SHA256/SHA512 hash. To use the username pi and the password from the file /tmp/pi.txt us the following command (replace /path/to/boot/ with the path to the boot directory on the SD card):

echo -n pi: > /path/to/boot/userconf
cat /tmp/pi.txt | openssl passwd -6 -stdin >> /path/to/boot/userconf

if needed, add your wifi configuration into boot/wpa_supplicant.conf - replace YOUR-COUNTRY-CODE with your 2-letter country-code (uppercase), and your-wifi-ssid and your-wifi-password with the correct values:

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev

If you don't want to add your wifi password as plain text, you can use wpa_passphrase to encrpyt it:

wpa_passphrase your-wifi-ssid your-wifi-password

then use this output as your your-wifi-password value in the wpa_supplicant.conf file.

You can add muliple network blocks if you want to add different wifi configurations; the first one that works will be used.

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