# Wrap-up; Glossary terms from week 3
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### **Terms and definitions from Course 4, Week 3** **Absolute file path:** The full file path, which starts from the root **Argument (Linux):** Specific information needed by a command **Authentication:** The process of verifying who someone is **Authorization:** The concept of granting access to specific resources in a system **Bash:** The default shell in most Linux distributions **Command:** An instruction telling the computer to do something **File path:** The location of a file or directory **Filesystem Hierarchy Standard (FHS):** The component of the Linux OS that organizes data **Filtering:** Selecting data that match a certain condition **nano:** A command-line file editor that is available by default in many Linux distributions **Options:** Input that modifies the behavior of a command **Permissions:** The type of access granted for a file or directory **Principle of least privilege:** The concept of granting only the minimal access and authorization required to complete a task or function **Relative file path:** A file path that starts from the user's current directory **Root directory:** The highest-level directory in Linux **Root user (or superuser):** A user with elevated privileges to modify the system **Standard input:** Information received by the OS via the command line **Standard output:** Information returned by the OS through the shell