Flash using the Raspberry Pi Imager – don't forget to click into the settings cog and adjust things like username/password, host IP etc, and turn on SSH

Add blank file ssh to the boot partition to enable ssh server on first boot. (Will be removed on boot.) Permanently enable ssh with sudo raspi-config → Interfacing Options → SSH. ← shouldn't be needed any more.

The default user (which can now be named slack comes with: slack adm dialout cdrom sudo audio video plugdev games users input render netdev gpio i2c spi. So I don't think any groups need adding. (See buster page if needed.)

Raspbian contains more packages than Debian net install it seems.

[Starting from the “full” desktop install but pitched at headless]

apt-get install screen zsh

gem install pry awesome_print

  ln -s /sys/bus/w1/devices /home/slack/w1

As buster.

Copy over authorized_keys from alan.

ssh-keygen -t rsa -b 4096 -C slack-np@walter

Copy id_rsa.pub into any authosized_keys as needed.

Pi-hole arranges/messes with this, so if you're installing that maybe set the IP address that way.

To set the hostname, use hostnamectl set-hostname walter, and then fix up /etc/hosts.