Displays information about one or more files
ls [options] [file-list]
The ls utility displays information about one or more files. It lists the information alphabetically by filename unless you use an option to change the order.
When you do not use an argument, ls displays the names of the visible files in the working directory (those files whose filenames do not begin with a period [.]).
The file-list contains one or more pathnames of files. You can use the pathname of any ordinary, directory, or device file. These pathnames can include ambiguous file references.
When you specify a directory, ls displays the contents of the directory. It displays the name of the directory only when needed to avoid ambiguity, such as when more ...