TestOut Linux Pro Practice Test 2025 – Complete Exam Prep Guide

The 'history' command in Linux is specifically designed to display a list of previously executed commands within the shell environment. When you run this command, it provides a numbered list of commands that you have entered in the terminal session. This feature is particularly useful for reviewing or reusing past commands without needing to retype them, as you can reference them by their number.

This command also enables users to see their command-line history, which can facilitate more efficient navigation and execution of commands. It usually retains command history across sessions, allowing users to access previous commands even after closing and reopening the terminal.

The other choices do not accurately describe the function of the 'history' command. For instance, current running processes are viewed using commands like 'ps' or 'top', while system error messages can typically be found in log files or can be viewed using commands like 'dmesg'. Installed software packages are managed with package management commands like 'apt', 'yum', or 'dnf', depending on the Linux distribution.