Close JupyterHub sessions

For students

• Connect to the campus VPN and log into the JupyterHub URL provided by your course staff.  Ensure the URL is prefaced with 'https://'.
  
  
• Follow the guide at the link below to close your JupyterHub session
  • https://jupyter-notebook-beginner-guide.readthedocs.io/en/latest/execute.html#kernel-shutdown

For course staff

• Please direct students to follow the guide at the link below to close their sessions
  • https://jupyter-notebook-beginner-guide.readthedocs.io/en/latest/execute.html#kernel-shutdown
    
    
• Connect to the campus VPN and log into the JupyterHub URL for your course.  Ensure the URL is prefaced with 'https://'.
  
  
• Select 'Admin' at the top
  
  
• Select 'stop server' for select users, or 'Stop All' at the top to end all sessions.  Note the 'Last Activity' and 'Running' columns to identify idle sessions.
• Course staff must regularly log in and close sessions to prevent the JupyterHub server from freezing

• If you cannot access the JupyterHub interface, you can still access the virtual machine hosting your course's JupyterHub instance via ssh and reboot the server.  
• ssh <NETID>@<HOSTNAME># The hostname of your server follows the URL for your JupyterHub instance i.e.: https://phys999-jupyter.engrit.illinois.edu implies a hostname of phys999-jupyter.engrit.illinois.edu
• Once you are logged into the system, you can just run "sudo reboot" and the machine will reboot.  
• Please note, the jupyterhub service on the server may take up to 15 minutes to start after a reboot.