Spack is a package manager for Linux and macOS. It allows the user to install software with all necessary dependency and to load relevant software. Spack creates unique configurations for software.

• Describe the concept of configurations and used hashing.
• Query information about packages:
  • list
  • info
  • find (also use -d to reveal their dependencies)
  • spec
• Load/Unload software modules.
• Describe the spec syntax to specify package configurations.