VNC to TACC

NOTE: VNC is used to see the job trackers and task trackers via Firefox. You may instead you elinks (text-based web browser, already installed on longhorn) on the command line to access the trackers.

• In the previous step we submitted a hadoop job file, got Hadoop-test.out file and read the tail of the output file to get the port number.

• Now you should setup SSH tunnel to connect via VNC client. If you're using Windows go on to the next bullet. In linux or UNIX environment, you can execute:

Replace xxxxx with the given port number (10222 in the above example) and <username> with your user name.

Make sure you run this on your local computer, not on the longhorn server. Open a new command client or putty to run the line.

Please note that you are tunneling to login1.longhorn.tacc.utexas.edu:10222.

• In a windows ssh client, find the menu where tunnels can be specified, and specify the local and remote ports as required, then launch the ssh connection to longhorn. For example, this image from PuTTY shows a tunnel from 10406 on the local machine to 10406 on longhorn:

• After setting up SSH tunnel, run a VNC client. VNC client is a remote desktop software. Just google VNC for a free VNC viewer. If you are using Ubuntu, the VNC client Vinagre is installed by default, so you should be able to just type 'vinagre' on the command line to start it up.

Run a VNC viewer/client and set the server localhost:xxxxx. Note that your password is the VNC password that you set in the first login (different from ssh login password).

If you successfully connect to VNC session, you will see firefox browser with HDFS browser and JobTracker monitor. (JobTracker may not run properly. We are still working on it.)