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Solaris™ 8 Advanced System Administrator's Guide, Third Edition by Janice Winsor

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Basic Concepts

A shell is a specialized Solaris command that provides an interface between the user and the operating system kernel. The kernel is the central core of the operating system and controls all basic aspects of a computer's operation. The kernel coordinates all of the executing commands and manages the system's resources. The shell is a special command interpreter that invokes and interacts with the kernel to provide a way for users to execute commands and other programs.

Each user is assigned a default shell that starts each time the user logs in to a system or opens a new Command Tool, Shell Tool, or CDE Terminal window. The shell interprets the commands that it reads. You can type those commands directly into the shell at the prompt, ...

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