Setting up X forwarding over SSH
If you want to run any of Oracle's GUI tools from a remote machine -- for example, to install Oracle on a remote machine -- you may need to set up X forwarding over SSH.
 Add the server's IP and name to your hosts file
- On Windows, the hosts file is found in C:\WINDOWS\system32\drivers\etc and is read-only.
- On a UNIX machine the hosts file is in /etc/hosts. You can add this info to ~/.rhosts instead.
Edit the file and add something like:
126.96.36.199 my.oracle.server.ca # My Oracle server
 Set your display variable and start X on your machine
- Windows: You'll need an X server. The easiest (and cheapest) solution is to install cygwin, which is open-source, free, and excellent. Make sure to install the X server when you install Cygwin. Once you've got Cygwin all set up, start it up. You'll be presented with a prompt.
- Unix: Make sure X is set up on your machine and get yourself a shell prompt.
Set your display environment variable to [your IP address]:0 and start X. This example assumes you're using Bash (the default for Cygwin), and that your IP address is 188.8.131.52:
$ export DISPLAY=184.108.40.206:0 $ startx &
 Ssh into the remote machine
You may want to use a different shell prompt for this command, because the window you used above will be cluttered with X messages. On most systems, "startx" will have popped up an xterm; use that.
$ ssh -l oracle -Y my.oracle.server.ca -b 220.127.116.11 email@example.com's password: Warning: No xauth data; using fake authentication data for X11 forwarding. [firstname.lastname@example.org]$
You're now logged in to the remote machine. Any X programs you tell it to run will pop up on your local display.
 Run X programs
Test your X setup by running a simple program like xeyes, xclock or runInstaller.
[email@example.com]$ xeyes &
Republished with permission from Natalka Roshak. Original URL: http://www.rdbms-insight.com/toolkit/x_forward.php