script to enable SSH on a fresh Raspbian (Raspberry Pi) install

ssh-on-first-boot-rpi.sh

#!/bin/bash
# Enables SSH on first boot by touching a blank file called `ssh` in the boot directory
# Requies the $disk argument (in the format /dev/sdX) to be set or passed as the fisrt command line flag.

disk="$disk$1"
if [[ -z  "$disk" ]]; then
    echo "You need to pass the install device (/dev/sdX) with the \$disk arg or as the 1st param"
    exit 1
fi

sync && partprobe $disk;
umount ${disk}{2,1};
mnt=$(mktemp -d);
mount -t auto ${disk}2 $mnt;
mount -t auto ${disk}1 ${mnt}/boot;
touch ${mnt}/boot/ssh;
sync && umount ${disk}{1,2}; echo 'done';