CIRC users may access the CIRC systems in two different ways: using command-line and/or using a graphical user interface (GUI). A GUI connection is used when you wish to visually interact with your jobs and can be done through the BlueHive 2 login node. New users may find a GUI interface easier than a command-line connection. To login to the CIRC machines, follow the steps below based on your operating system and according to the type of login you wish to use.

Connect using the Command Line

To access CIRC systems using Windows, you must first install an SSH client. The CIRC suggests using PuTTY, which is a free program. You can download it here:

Find the link to download putty-installer.exe on the page above.

Once you have PuTTY downloaded, you can begin setting it up:

  1. Run the installer. Accept all default options, and click ‘Yes’ or ‘Allow’ to any security prompts that may appear.

  2. Open PuTTY (Start → All Programs → PuTTY)

  3. Type in the ‘Host Name (or IP Address)’ field. Set the ‘Connection Type’ to ‘SSH’ if it isn’t already.


  4. Click Open.

  5. Click Yes at the security warning dialog. This will only happen the first time you connect to Blue Hive. A terminal window will appear and prompt you for both your NetID and password. Once you have entered them, a login message will appear.


Connecting using a Graphical User Interface

A graphical user interface (GUI) allows users to interact with various software programs visually, such as Matlab or Mathematica. The tutorials below list instructions on how to install and use several GUI programs suggested for use on the CIRC machines. Instructions for using the X2Go GUI are presented first.

The X2Go Client is free to download and works on any system. CIRC recommends this method as it provides the fastest access to CIRC systems.

  1. Download a copy of X2Go for free at:

  2. Launch the .exe installer file and complete the setup, following defaults.

  3. Launch X2Go from your start menu. You will be presented with a blank connection setup window. Enter a name for this connection, as the host name, and GNOME as the session (to use CIRC’s default environment).

    X2Go Windows

  4. Adjust preferences in the Connection and Settings window to your liking. You can increase quality by changing speed to LAN in the Connection tab, and edit the default window size in Settings.

  5. In the Settings tab, uncheck Client-side printing support.

  6. In the Shared Folders tab, uncheck `Use SSH port forwarding to tunnel file system connections through firewalls` and make sure there are no shared folders listed.

  7. Click OK once you’re done configuring options.

  8. You can then double-click on the session you’ve created to connect to BlueHive.

    X2Go Windows

To exit X2Go, simply close the window.