TestOut Linux Pro Practice Test

The command line option that provides detailed information about a file is indeed "ls -l". This command is used in Unix-like operating systems to display a long listing format of files in a directory. The output includes vital details such as file permissions, the number of links, the owner of the file, the group associated with the file, the file size, the last modified date and time, and the filename itself.

This rich set of information allows users to understand not just the identities of the files present in a directory, but also their permissions and attributes, which are essential for file management and security purposes.

Other command options can provide different outputs. For instance, "ls -a" lists all files, including hidden files (those beginning with a dot), but does not give further details about them. "ls -lh" also shows a long listing but formats file sizes into a more human-readable form (like KB and MB); however, it still belongs to the broader "long listing format" category. The command "list -details" is not a standard command in Linux, making it nonviable for file detailing.