list directory contents

-l     use a long listing format

-a, --all
       do not ignore entries starting with .

-h, --human-readable
       with -l, print sizes in human readable format (e.g., 1K 234M 2G)

List information about the FILEs (the current directory by default).  Sort entries alphabetically if none
of -cftuvSUX nor --sort is specified.