Everything is a file:- Unix / Linux System treat everything as file including hardware. Unix / Linux security model is based around the security of files.
Small, Single-Purpose Programs:- Unix / Linux provides many small utilities that perform one task very well.
Ability to chain Programs:- A core design feature of Unix / Linux is that the output of one program can be the input for another program.
Avoid Captive User Interface:- Interactive commands are rare in Unix.Configuration Data Stored in Text:- Text is a Universal interface, and many Unix utilities exist to manipulate text. Storing configuration in text allows an administrator to move a configuration from one machine to another easily.
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