Which command is used to list files and directories in the current directory?

The command used to list files and directories in the current directory is "ls." This is a fundamental command in Unix/Linux environments and is widely used to display the contents of a directory. When executed without additional options, "ls" will show all files and directories located in the current working directory, providing a quick overview of what is present.

This command can also be enhanced with various options to alter its output, such as including hidden files (using "-a") or displaying details like file permissions, sizes, and modification times (using "-l"). As such, "ls" is a versatile and essential command for anyone working in a Linux terminal or command line interface, enabling users to navigate and manage files effectively.

In contrast, while "dir" is a command that lists directory contents, it is primarily used in DOS and Windows command-line environments rather than on Linux. The options "list" and "show" are not valid commands in this context, making "ls" the correct choice for this task.