# USE1.4-B Software Environment
# Background
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

# Aim
  * To utilize different package management tools to make software available.

# Outcomes
  * Understand shell variables relevant for executing and building software.
  * Query available software using the package manager.
  * Select the appropriate versions for deployment in the session environment.

# Subskills
  * [[skill-tree:use:1:4:1:b]]
  * [[skill-tree:use:1:4:2:b]]
  * [[skill-tree:use:1:4:3:b]]