In Linux, what does the command 'ls -l' display?

The command 'ls -l' in Linux provides a detailed listing of files and directories in the current directory. When this command is executed, it displays several important pieces of information for each item, such as file permissions, number of links, owner name, owner group, file size, and the last modified date and time. Additionally, it lists the names of the files and directories themselves. This level of detail allows users to understand the attributes and properties of the files and directories, which is essential for managing file permissions and understanding the structure of the filesystem.

The other options do not accurately describe the output of the 'ls -l' command. While hidden files can be displayed by adding a specific flag to the command (like 'ls -la'), the command by itself does not focus exclusively on hidden files. Running processes are displayed with commands like 'ps' or 'top', and current disk usage is checked with commands such as 'df' or 'du'. Therefore, the choice that states 'ls -l' displays a list of files and directories with detailed information is the most accurate.