Which command is used to list the contents of a directory in Linux?

The command used to list the contents of a directory in Linux is "ls." This command is a standard tool in Unix and Linux systems that displays files and directories contained in the specified directory. When executed without any arguments, it shows the files and directories in the current working directory.

The "ls" command can also be modified with various options to alter its output, such as displaying hidden files (using the -a flag) or showing detailed information about each file (using the -l flag). It is widely utilized for navigating and managing files within the directory structure of a Linux file system.

Alternative commands, such as "dir," may also list directory contents in some contexts or systems, but "ls" is the most commonly recognized and used command for this purpose in Linux environments. Other options like "list" and "show" are not valid commands for listing directory contents in the Linux command line.