Do not hide entries starting with ``.''.
Do not list ``.'' and ``..''.
Multi-column output. This is the default output format.
List directory entries instead of the contents.
Specifies seconds to hold attribute cache. If 0 is specified, attributes won't be cached.
Append indicator (one of */=@|) to entries.
Display inode number.
List in long format, including mode, owner, group, size in bytes, time of last modification for each file.
Reverse the order while sorting.
Recursively lists subdirectories encountered.
Sort by file size.
Sort by time stamp instead of by name.
-l option, show complete date format.
Prints one entry per line of output.
displays a list of command options.