Remotely unlock encrypted root disk using SSH

sudo apt install dropbear-initramfs
 
sudo sed -i 's/#DROPBEAR_OPTIONS=/DROPBEAR_OPTIONS="-I 180 -j -k -p 4000 -s -c cryptroot-unlock"/g' /etc/dropbear/initramfs/dropbear.conf
 
# optional: configure IP if no DHCP avaiable
# echo 'IP=192.168.2.123::192.168.2.1:255.255.254.0:my-wks01' >> /etc/initramfs-tools/initramfs.conf
 
sudo ssh-import-id gh:<my_user_id> -o /etc/dropbear/initramfs/authorized_keys
 
sudo update-initramfs -u
 
ssh root@your_workstation_ip -p 4444
 
# unlock disk
unlock-cryptroot