sudo adduser slack
sudo adduser slack sudo
sudo adduser slack adm

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 stretch.

Copy over authorized_keys from alan.

ssh-keygen -t rsa -b 4096 -C "dan.hetherington@gmail.com"

Copy id_rsa.pub into any authosized_keys as needed.