Which command is used to display the current working directory?

The command used to display the current working directory is "pwd," which stands for "print working directory." When executed in a terminal session, this command outputs the full path to the directory that the user is currently in. It's a fundamental command in Linux, essential for users to understand their location within the filesystem hierarchy.

The other commands serve different purposes: "cd" is used to change the current directory; "ls" lists the contents of a directory; and "dir" is a command used to list directory contents in some environments, though it's more commonly associated with DOS-like systems rather than Linux. Thus, "pwd" is the correct command to reveal the current location in the filesystem.