X-windows exercises:

X-windows allows you to use a remote computer (examples: "roxi.rz.fh-mannheim.de" or "clone3.mcb.uconn.edu") with a graphics user interface. This remote computer is called a client, programs you run on this computer are called client programs. These client applications need to be designed to use x-windows. Often your local pc (the server -- I know, usually the terms are used the other way around, but I can't change it) is set up to log into a client and start some client applications automatically.

Setting up a client is easy. You need only two commands:

1.) tell the client to direct the display to your local PC;

2.) Start your client application.

One way to do this is to use telnet, and an X-windows server in parallel.

As a rule this is more reliable than to launch applications menu from within the X-windows server (the latter is faster though, if it works). Launch the x-Windows server by double clicking. If it opens some default client you can close the client, but leave the server running.

Telnet to your client (roxi.rz.fh-mannheim.de) and tell it to export the display

for unix ksh the command is:
"export DISPLAY=your.internet.address.edu:0"


To launch seaview or phylowin as client application on ROXI enter the line command

"seaview &" or "phylowin &" (the & put the application into background)

Possible client applications on UNIX are (I have no idea is these are availabe on ROXI):

"xclock &" (the space & after a unix command makes this command run in background, in this case the clock keeps on running until you close the clock window)

"dtpad &" - this starts a text editor on the UNIX machine. This comes in handy if you want to modify a file without FTPing it back and forth to your local PC.

"aixterm &";"xterm &" : terminal windows (instead of your telnet window)

"info" start information/help program

"xcalc &" start a pocket calculator application

"xmaple &" starts a symbolic math computation pack

"xman" UNIX manual

"xloadl" starts loadlevel batch program manager

"mathematica" starts software package