1. Getting a dummy Xserver running using Xvfb (virtual frame buffer Xserver) link
   
   1. install Xvfb
      
   2. Xvfb :1& export DISPLAY=:1 run_whatever_program_you_want
   3. Links to X virtual frame buffer (Xvfb)
2. If you run Java 1.4 or later you can use java in headless mode. This is done by starting the java machine with the "-Djava.awt.headless=true" parameter.
   This problem I have found with Repast ver2.0 and might affect those wanting to test a graphics program in JAVA under UNIX without wasting painting resources.
3. A beginners guide to PERL scripts
4. A quick guide to VI- text editor for unix
5. When installing packages under Python (in this case 2.4) running under cygwin on a winXP machine:
   • save the package under cygwin (typically a .tar.gz file)
   • unpack creating a directory (eg. Numeric-24.1). This could even be at the same level as home, or lower, like user_name.
   • cd to the installed directory, and type the foll commands:
     $ python setup.py build
     $ python setup_all.py install
     $ python setup_all.py clean
   • check for installation (in this case of NumPy or Numeric package for Python) by the foll commands:
     $ python
     >>import Numeric
     >>Numeric.__version__

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