Which command is used to list files in a directory?

The command used to list files in a directory in Linux is "ls." This command provides essential functionality in the command-line interface, allowing users to see all files and directories within the current working directory. When executed, "ls" presents a list of files along with various options that can alter the output, such as showing hidden files, displaying detailed information, or sorting the list by different criteria.

Understanding the command "ls" is fundamental for users interacting with Linux systems, as it is often one of the first commands learned. It is also widely used in scripting and command-line operations for file management. While other systems, such as Windows, may utilize commands like "dir" for similar purposes, "ls" is the standard in Linux environments, making it an essential tool for navigating the filesystem.