This is a part of the Houdini for Linux's Installation README file.
3.Before Starting Houdini, you must first set up the shell environment.
At a C shell prompt (csh or tcsh), type the following:
source houdini_setup
This command initializes the current shell's environment to run
Houdini.
How to set up this shell environment?
Should I use dircolors?
Thank you.

dircolors is a environment variable within your shell, and probably has absolutely nothing to do with the software you're trying to get running.

Look at the file (houdini_setup) that the documentation mentions to see what it contains. Most likely you are required to configure new environment variables to support the program.

For example, using: ' Xiangbuilder=1' will set the environment variable ' Xiangbuilder' to '1'. Using 'echo $Xiangbuilder' should display the contents of the environment variable, '1'.

I hope this helps..

Thank you very much.
I think the README file's meaning is leave the default shell,
bash, and enter the C shell (csh or tcsh).
How to enter the C shell (csh or tcsh)?
Thank you.

just enter 'csh' in a terminal, if that doesn't work: check if it's installed (if not: http://www.rpmfind.net/linux/rpm2htm...mit=Search+...)
and the path

Thank you very much.