---
title: "Modulefiles"
---

## What are modulefiles?

Modulefiles (or Lmod) is installed on almost every HPC system these days. It is a set of tcl/tk or lua scripts to swap software in and out of your current environment. It does this (mostly) by managing your environment variables, namely, `PATH` and `LD_LIBRARY_PATH`.

```bash
module avail
module list
module load eic_container
module list
module purge 
module list
```


https://modules.readthedocs.io/en/latest/