HPC systems have generally installed multiple versions of several essential software tools and software environments. Package management tools provide access to this wide variety of software. A user has to load the software for the current shell session to make commands available.

The widely available software tools are:

• Environment modules
• SPACK
• Conda

• Query available software using the package manager and select the appropriate versions for deployment in the session environment.
• Describe the MODULEPATH variable and understand shell variables relevant for executing and building software
• Query information about packages using SPACK and install as well as load and unload software modules
• Understand what conda environments are for and how a user can install their own environments

• USE1.5.1 Environment Modules
• USE1.5.2 Spack
• USE1.5.3 Conda environments