You are here: Home Help/User Support Remote Access to Linux/Unix Systems Mac OS X Mac OS X (for graphical Unix programs)

Mac OS X (for graphical Unix programs)

Setting up your Mac OS X system for displaying Unix and Linux programs from CAE systems to your Mac. This allows you to run Unix and Linux applications (such as ANSYS) that are unavailable on Mac OS X, or to take advantage of the remote system's extra compute power without overloading your Mac.

The combination of the X Window System and a secure shell (SSH) program means that you can run an application on one of the CAE network's Unix or Linux workstations without leaving your office. OS X 10.4 (Tiger) includes all the necessary software on your installation DVD. OS X 10.3 (Panther) users will need a free download of the X Window System from Apple. If you use OS X 10.2 or earlier, you'll need to upgrade to have an easy way of running X Window System applications.

If you have OS X 10.4, look in your Utilities folder for an X11 icon as shown below. If the X11 icon is not installed, see article 301229 in the Apple support site for instructions on how to install X11 from your operating system DVD. In particular, read the section titled "More custom reinstallation options with Mac OS X 10.4". If you have OS X 10.3, download and install X11 from Apple's website.

X11 in the Utilities folder

Once you've verified that X11 is installed, double-click its icon in the Utilities folder. After X11 has started, you should see an xterm window on your screen as shown below.

X11 started

At your xterm's $ prompt, use the ssh command to log into one of the CAE network's Unix or Linux systems (click here for a list of those systems). The form of the ssh command is

ssh -Y username@hostname.cae.tntech.edu

where username is your CAE username and hostname is the name of the Unix or Linux system you want to log into. The first time you try to connect to one of the CAE systems, you'll be prompted about an unrecgonized RSA key. This prompt should only happen once per CAE system, and if it happens more than once, one of the following things has happened:

  1. You've completely reinstalled your Mac or your home directory on your Mac, causing it to lose its record of the remote system's host key.
  2. The remote system has been reinstalled. To check on this possibility, contact Joel Seber (CH301, x3734) or Mike Renfro (CH314, x3601). The likelihood of a complete system reinstall on a CAE system is pretty low, however.

If you've verified that neither your Mac nor the CAE system has been reinstalled, STOP NOW and contact Mike Renfro or Joel Seber. There is a chance that a router or other system between your Mac and the CAE lab has been broken into, and opens up the possibility that your password or other information could be intercepted.

Logging in for the first time

Enter your CAE network password when prompted. If you typed it correctly, you should be logged into the remote system, and should see the remote system's $ prompt. Once you see the remote system's $ prompt, you can run most graphical applications by typing their command. For example, ANSYS 10.0 is run by typing launcher100 and pressing the Return key:

Launching ANSYS 10