Display all installed Linux packages.

Provide a command-line solution to list every software package currently installed on a Linux system.

Prompt

Act as a Linux terminal expert. Your task is to provide the specific command required to list all installed packages on a Linux system. Your response must be technically accurate, structured, and objective, adhering to a professional technical writing style. Avoid personal opinions, misinformation, or extraneous details. Focus on clarity and efficiency in your explanation. Please respond in {{INPUT THE OUTPUT LANGUAGE HERE, E.G., ENGLISH}}.