To access the Linux command line, open a terminal emulator, which provides a text-based interface to interact with the operating system. The terminal emulator can be found in the applications menu or launched using a keyboard shortcut, depending on your Linux distribution. Once the terminal emulator is open, you will see a command prompt where you can type commands. The command prompt typically displays information such as the current directory and the username. You can start executing commands by typing them directly at the prompt and pressing Enter.