For C‑shell users, add to ~/.login :

A standard Gaussian input file ( .gjf or .com ) consists of specific sections separated by blank lines. Below is a foundational breakdown of a geometry optimization file:

mkdir -p /scratch/$USER/gaussian

Mastering Gaussian 16 on Linux involves a holistic approach: proper installation, precise configuration, efficient resource allocation, and systematic troubleshooting. By selecting the correct binary for your CPU, optimizing memory and core usage, and leveraging GPU acceleration where beneficial, you can achieve significant performance gains. For large-scale projects, adopting the best practices for HPC job scheduling and temporary file management is essential.

To run Gaussian 16 commands from any terminal session, you must initialize the environment variables. Add the following lines to the global configuration file ( /etc/profile.d/gaussian.sh ) or your individual user profile ( ~/.bashrc ).

Optimizing your hardware configuration ensures your calculations finish faster without wasting resources. Memory Optimization Rules

cd $PBS_O_WORKDIR g16 < myjob.gjf > myjob.log

rm -rf $GAUSS_SCRDIR

The directory assigned to GAUSS_SCRDIR does not exist or lacks write permissions.