Page 4 - RHEL8 BOOK
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OPERATING SYSTEM: -
An Operating System is the Software that manages the computer’s hardware and provides a convenient
and safe environment for running programs and hardware resources that these programs like Memory,
hardware and printer.
Function of O.S: -
Process Management
Memory Management
Data Management
I/O Management
LINUX ARCHITECTURE: -
USER
OTHER PROGRAM
SHELL
KERNEL
HARDWARE
KERNEL: -
It is the interface between H/W devices and Shell.
It is a Set of Function that makes up the heart of an O.S.
It controls the execution process, scheduling process fairly for execution on the CPU.
Allocating memory for an execution processes.
SHELL: -
Shell is the Interface between the user and the Kernel.
It is the command Interpreter to kernel
The kernel after processing the commands gives back to the Shell.
History of Unix
MULTICS Started in 1995 by AT & T, GE and MIT
UNICS Created by Ken Thompson in 1969
UNIX Written in 100% c Language and released in 1973
S. Pradhan
(MCA, MBA-IT, BCA, CCNA, MCSA 2012, RHCE, ETHICAL HACKING)
Email Id:-spradhan.iiht@gmail.com
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