Which command is used to list files and directories in Linux?

The command used to list files and directories in Linux is "ls." This command displays the contents of a specified directory, showing both files and subdirectories by default. It is one of the most fundamental commands in Linux and is widely used due to its simplicity and effectiveness.

Using "ls" without any options will provide a basic listing of the files in the current directory. The command can also be modified with various options to display additional information, such as file details, sizes, permissions, and hidden files. For instance, using "ls -l" gives a detailed list in a long format, while "ls -a" includes hidden files (those beginning with a dot).

Other options provided, such as "list," "dir," and "show," either do not exist as standard commands in the same context or are typically associated with other systems or user interfaces. "dir" is a command that is occasionally used in some Linux distributions and is more commonly found in DOS and Windows environments, but it is not the standard command for listing files in Linux. "list" and "show" do not serve as commands for this purpose in a Linux environment.