My AFP server stopped working, so I decided to reboot it:
pi@raspberry-pi-server:~ $ sudo reboot Failed to start reboot.target: Activation of org.freedesktop.systemd1 timed out Failed to open initctl FIFO: No such device or address Failed to talk to init daemon.
I ran apt-get upgrade, as this seems to be some sort of kernel issue.
Now we are stuck on:
Unpacking raspberrypi-bootloader (1.20170427-1) over (1.20170405-1) ... Setting up raspberrypi-bootloader (1.20170427-1) ... Removing 'diversion of /boot/start.elf to /usr/share/rpikernelhack/start.elf by rpikernelhack'