About LS
In computing, ls is a command to list computer files and directories in Unix and Unix-like operating systems. It is specified by POSIX and the Single UNIX Specification.
It is available in the EFI shell, as a separate package for Microsoft Windows as part of the UnxUtils collection of native Win32 ports of common GNU Unix-like utilities,
or as part of ASCII's MSX-DOS2 Tools for MSX-DOS version 2.
The numerical computing environments MATLAB and GNU Octave include an ls
function with similar functionality.
In other environments, such as DOS, OS/2, and Microsoft Windows, similar functionality is provided by the dir command.
