# USE1 Overview: Cluster Operating System

HPC systems are usually accessed via a Linux-based Command Line Interface (CLI).
Via the CLI, users can run programs to manipulate files, load additional software, or execute programs.

While there are many similarities to single-user Linux systems, HPC systems differ widely in the management of provided Software packages, and users must pay attention to the locality of data.

## Learning Objectives
  * Describe the command line interface and the bash shell.
  * Sketch the organization of the typical file system tree.
  * Utilize essential tools to navigate and manage files.
  * Utilize package management tools that provide access to a wide variety of software.
  * Use and write basic shell scripts, e.g., to automate the execution of several commands.
  * Utilize tools to transfer data between a desktop/laptop system and a remote HPC system.

## Subskills
  * [[skill-tree:use:1:1:b]]
  * [[skill-tree:use:1:2:b]]
  * [[skill-tree:use:1:3:b]]
  * [[skill-tree:use:1:4:b]]
  * [[skill-tree:use:1:5:b]]