ls ls command lists the contents of, and optional information about, directories and files.
With no options, ls lists the files contained in the current directory, sorting them
alphabetically.
$ ls [option ...] [file]...
ls [option ...] [file]...Shows the hidden files in the directory as well.
$ ls -a
a.txt b.txt c.txtShows file or directory, size, modified date and time,
file or folder name and owner of file and its permission.
$ ls - l
$ -rw-r--r--. 1 <directory> 683 Aug 19 09:59 a.txt
$ -rw-------. 1 <directory> 1586 Jul 31 02:17 b.txt