Which command is used to list files in a Linux directory?

The command used to list files in a Linux directory is "ls." This command is fundamental in Linux and Unix-based systems, providing users with a way to display a list of files and directories contained within a specified directory, enabling them to understand the contents and structure of the filesystem.

When executed without any arguments, it shows the files in the current directory. However, it can also accept various options and arguments that allow customization of the output. For example, using "ls -l" provides a detailed listing with file permissions, ownership, and sizes, while "ls -a" includes hidden files in the output.

Other commands like "dir," while used in some operating systems, are more closely associated with DOS or Windows command environments rather than Linux. The commands "cd" (change directory) and "mkdir" (make directory) serve different purposes that do not relate to listing files, reinforcing the significance of "ls" as the appropriate tool for that task.