After install Nginx on my Ubuntu the system is crashed.

After install Nginx on my ubuntu the system send me the message “Restarting the system to load the new kernel will not be handled automatically, so you should consider rebooting.” and crash, I can’t enter any command on the terminal. I using the MTPuTTY to connect via SSH if I open another connection the result is that “Command ‘lesspipe’ is available in the following places

• /bin/lesspipe
• /usr/bin/lesspipe
  The command could not be located because ‘/bin:/usr/bin’ is not included in the PATH environment variable.
  lesspipe: command not found
  Command ‘dircolors’ is available in the following places
• /bin/dircolors
• /usr/bin/dircolors
  The command could not be located because ‘/usr/bin:/bin’ is not included in the PATH environment variable.
  dircolors: command not found”. In my instance I choiced “Reboot Instance” in instance state button but not happen.
  Image of system crashed:
  
  Image of terminal where all commands is refused:
  
  Thanks and best regards.