I use ssh and vnc to view the desktop. I completed the complete installation and upgrade by sudo apt-get install kali-linux-full. After the completion of the upgrade I shut down the pi3. From the next reboot it was not displaying on the network. I should mention that I do not have a monitor attached with the pi3. I use putty and vnc to use it. I cannot SSH it anymore as it is not displaying on the network. I would be very grateful if anyone on this forum could help me.