Raj is a Linux server without a desktop GUI interface. Access to the cluster is gained through the secure shell (ssh) protocol.

Accessing Raj via Linux

On a Linux machine, you can use the ssh command to access Raj. Open a terminal and type the following command:

ssh <your-Marquette-username>@raj.marquette.edu

This will be followed by a prompt for a password. Input your Marquette password and hit enter and a shell will be opened for you on Raj. If you need access to X applications (i.e., GUI applications) on Raj, you can add the "-X" option in the ssh command like so:

ssh -X <your-Marquette-username>@raj.marquette.edu

Accessing Raj via macOS

Accessing Raj via a Mac is identical to accessing Raj via a Linux machine. Open a terminal and type the following command:

ssh <your-Marquette-username>@raj.marquette.edu

This will be followed by a prompt for a password. Input your Marquette password and hit return and a shell will be opened for you on Raj.

If you need access to X applications (i.e. GUI applications) on Raj, you will first need an X11 server. The most commonly used one is XQuartz and can be found at XQuartz website. After you have installed and launched your XQuartz server you can access X11 forwarding by adding the "-X" option in the ssh command like so:

ssh -X <your-Marquette-username>@raj.marquette.edu

Accessing Raj via Windows

Windows machines do not have a default ssh client, therefore, one must be installed before gaining access. The most commonly used ones are MobaXterm, PuTTY  and most recently the Windows Subsystem for Linux or WSL for short.

MobaXterm

To access Raj via MobaXterm, launch the application, click on the icon called Session, then click SSH and use the following settings:

Remote host: raj.marquette.edu

Specify username: <your-Marquette-username>

You will then be prompted for a password. Input your Marquette password and hit enter and a shell will be opened for you on Raj. If you want access X applications (i.e., GUI applications) MobaXterm is comes with an X11 server and initiates X11 forwarding by default so no additional steps are needed.

PuTTY

To access Raj via PuTTY, launch the application and in the Host Name field input raj.marquette.edu. You will then be prompted for a username and password. Input your Marquette credentials and a shell will be opened for you on Raj.

If you need access to X application (i.e., GUI applications) on Raj, you will first need an X11 server. The most commonly used one is Xming. Once you have installed and launched the X11 server you can add X11 forwarding to your PuTTY session by navigating to Connection → SSH → X11 in the side panel and checking the box for Enable X11 forwarding. In the field for X display location input localhost:0.0 which is the default location used by Xming. Then continue to connect as normal and an X11 ssh session will be opened for you on Raj.

Windows Subsystem for Linux

This method essentially installs a Linux terminal on your Windows Machine. Thus accessing it is similar to how you would on a Linux machine. Open WSL a terminal and type the following command:

ssh <your-Marquette-username>@raj.marquette.edu

This will be followed by a prompt for a password. Input your Marquette password and hit Enter and a shell will be opened for you on Raj.

If you need access to X applications (i.e., GUI applications) on Raj, you will first need an X11 server. The most commonly used one is Xming. After you have installed and launched your Xming server you can access X11 forwarding by setting the DISPLAY environment variable and adding the "-X" option in the ssh command like so:

export DISPLAY=localhost:0.0
ssh -X <your-Marquette-username>@raj.marquette.edu

Accessing Raj Through the Bright Computing Web Interface

The Bright Computing Cluster Manager, which is used as an administrative tool on Raj, provides a user portal. Although you cannot submit jobs from this interface, you can use it to view the state of the cluster, query and plot usage statistics, as well as monitor jobs and attach your browser to the STDOUT and STDERR channels of running jobs. To access the user portal direct your web browser to https://raj.marquette.edu/userportal/ and enter your Marquette username and password.
Chrome users may see a prompt asking for a login certificate. If you see this click the cancel button. From there you can navigate the different tabs to monitor jobs and view usage statistics. For more information on how to use the user portal see section 12 of the Bright Cluster Manager User Manual.

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