LAMMPS (Large-scale Atomic/Molecular Massively Parallel Simulator) is a classical molecular dynamics code with a focus on materials modeling produced by Sandia National Laboratories.
Sample scripts for LAMMPS use are available in directory /opt/packages/examples/lammps on Bridges.
To see what versions of LAMMPS are available type
module avail LAMMPS
To see what other modules are needed, what commands are available and how to get additional help type
module help LAMMPS
To use LAMMPS, include a command like this in your batch script or interactive session to load the LAMMPS module:
module load LAMMPS
Be sure you also load any other modules needed, as listed by the
module help LAMMPS command.