Final answer:
To get help on the command 'ls', use the command 'man ls'. The 'man' command opens the user manual for many commands in Unix-based systems, whereas 'help' is for shell built-ins.
Step-by-step explanation:
To get help on the command ls, you can use the man command followed by ls. The correct command to use is man ls. The man command stands for manual, and it provides detailed documentation on many commands available in Unix-based operating systems, including Linux and macOS. When used with ls, it will display the user manual for the ls command, which lists directory contents and explains how to use it with various options.The correct command to get help on the ls command is man ls. The man command is short for 'manual' and is used to display the manual pages for a particular command in Unix-like operating systems, including Linux. It provides detailed information about the command, including its usage, options, and examples.
The help command is generally used for getting help on shell built-in commands, which does not include ls, as it is a separate binary executable. Similarly, help list would not work as there is no built-in or standard command named list in Unix-based shells. The command man list would also not return useful information unless there is a specific command named list installed on the system which has an associated manual page.