LS
ls is a shell command for listing files – including special files such as directories. Originally developed for Unix and later codified by POSIX and Single UNIX Specification, it is supported in many operating systems today, including Unix-like variants, Windows (via PowerShell and UnxUtils), EFI, and MSX-DOS (via MSX-DOS2 Tools).
The numerical computing environments MATLAB and GNU Octave include an ls
command with similar functionality.
In other environments, such as DOS, OS/2, and Command Prompt, similar functionality is provided by the dir command.
An ls command appeared in the first version of AT&T UNIX, the name inherited from Multics and short for "list". ls is part of the X/Open Portability Guide since issue 2 of 1987. It was inherited into the first version of POSIX.1 and the Single Unix Specification.
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