Locked out with SSH from server after update ISPConfig to latest version and updating Debian Jessie and suggested by the messages from ISPconfig and rebooted. No websites came backup after reboot but can ping the server. I can get to the server with host's Ubuntu Rescue via SSH, however at a loss what to do after mounting the boot disk. Logs don't appear to show anything as the last log entries are from the reboot. There was an SSL certs problem after the updates, which was trying to fix before the server went dead and I decided to reboot. Any docs or pointers as to what to check to get server back by using the Rescue mode?