Unix - Linux Command Reference

You may have often heard abut both Unix and Linux operating systems. In today’s world Linux is more famous than Unix but Unix has its own users. While Linux is an open source, free to use operating system widely used for computer hardware and software, game development, tablet PCS, mainframes, Unix is a proprietary operating system commonly used in internet servers, workstations and PCs by Solaris, Intel, HP etc. Unix is a family of multitasking, multiuser computer operating systems that derive from the original AT&T Unix, developed in the 1970s at the Bell Labs research center by Ken Thompson, Dennis Ritchie, and others.
Unix and Linux Reference commands are very useful for the users.
It is updated 2017 version we hope you like it
The Linux / Unix operating systems come with many commands that the user can enter into the computer from the keyboard and use to interact with the computer. There are two kinds of commands that come with a Linux / Unix operating system: Shell Commands and Linux/Unix Commands. Here is a comparison of the two:

Built-in Shell Commands:
What are they? They are part of a shell. In other words, each shell (e.g., C Shell, Bourne Shell and Korn Shell) has a set of commands built into its program.

These information are available on public domain as well.
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