Please note: The FAQ pages at the HPCVL website are continuously being revised. Some pages might pertain to an older configuration of the system. Please let us know if you encounter problems or inaccuracies, and we will correct the entries.
There are two ways to set up your environment to enable Gaussian.
The hard way: You can also do things manually. Include the following lines in your setup files (.login for csh, .bash_profile for ksh or bash):
setenv g09root /opt/gaussian
setenv GAUSS_SCRDIR /scratch/hpcxxxx
export g09root=/opt/gaussian .
Note that the setting of the environment variable GAUSS_SCRDIR is necessary to redirect the temporary files that Gaussian creates to the proper scratch space. This directory should be /scratch/hpcxxxx (replace the xxxx by your username's numbers). This is done automatically if you apply the use command.
Also note that if for some reason Gaussian does not terminate normally (e.g. a job gets cancelled by hand), it leaves behind large "scratch files" which you should delete by hand. To check if such files exist, type
ls -lt /scratch/hpcxxxx
where xxxx stands for the numbers in your username. Once you have determined that the scratch files are no longer needed, you can delete them by typing
where, again, xxxx needs to be replaced by the numbers in your username.
Cleaning up the scratch space is the user's responsibility and cannot be done by the system administrator. If scratch space does not get cleaned up regularly, it can cause jobs to terminate, and much work to be lost. Please do it.