The Xunil machines are provided for ECE faculty and students for classwork requiring a Linux environment, Drexel or COE licensed software, or a CUDA environment. These systems are managed by the College of Engineering Computing and Technical Services Staff. If there are any questions, concerns, or problems please let the COE CTS team know and we will investigate your issue.

Every user is expected to follow the Drexel Code of Conduct and the Drexel Acceptable Use Policy when using these computing resources.

What machines are part of the Xunil system?
Currently the following machines are part of Xunil:

  • xunil-03.coe.drexel.edu
  • xunil-05.coe.drexel.edu

How do I access the Xunil machines from Windows?
The Xunil machines can be accessed using an SSH client. On Windows machines you will need PuTTY for strictly text based access or the X-win32 program (available at https://software.drexel.edu/) for a graphical/x client access.

How do I access the Xunil machines from a Mac?
The Xunil machines can be accessed using an SSH client. Macs have a built in terminal that have an SSH client. This is located at /Applications/Utilities/Terminal.app on your system. If you need graphical/x client access you will need to install the XQuartz package before connecting.

How do I access the Xunil machines from another Linux machine?
The Xunil machines can be accessed using an SSH client. Almost all Linux machines come pre-installed with the necessary software for both text based and graphical/x client connections.

Where is my data stored?
Your data is stored in your home directory. These directories are located at /home/DREXEL/<your DrexelOne username>, these home directories are shared between systems.

What happens to my data after the term ends?
Your data is erased from the Xunil system between terms. If the data is critical you will need to backup your files off the system to personal storage.

Where is the licensed software located?
All licensed software is located in /opt.

I need to use the GPU for CUDA purposes, which machine has this equipment?
The GPU and all related CUDA software is on the xunil-05.coe.drexel.edu machine.

Can Xunil be used for research purposes?
No, Xunil is only licensed for teaching and classroom purposes. Any user doing research using these machines will lose their access and any research data will be erased.

What happens to my SSH session if it’s logged in and idle?
All Xunil machines have a session timeout period of 12 hours. Any idle session going longer than this will automatically be ended. If you require more time please consider using a terminal multiplexer. Tmux, Screen, and Byobu are all installed on the Xunil machines for this purpose.

What happens to my process if it’s affecting other users, taking up too many system resources, or running for too long?
Any process taking up significant processor and memory usage or running for more than 24 hours will be forcibly closed so that other users are not affected.

If I experience any problems, how do I get help?
If you experience any problems with the Xunil systems please contact the Computing and Technical Services team at helpdesk@coe.drexel.edu. Please include your username, what you were trying to do, what program you were using, and any error message you received.