Linux Basics part2 About OS ,Kernel and Shell

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Operating System:
-Software/Program intracts with Hardware(CPU,RAM,MB,HDD..)
and users , runs application
-Kernel and Shell

Kernel - intracts with Hardware
Shell - intracts with user, user cmd, and run application

Kernel
-Hardware Management
--Disk Management
--Process Management
--Network Management
--Memory Management

Shell
-User Interface, User Intraction, run user cmds and application
-BASH - Bourne Again Shell - Linux/Unix
-SH - Bourne Shell
-KSH -Korn Shell
-tsh
-csh

Most commonly used shell in Linux/Unix - BASH

What OS?
What is Kernel and Shell?
What are shell, mostly used ?
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Operating System:

SOS:Simple Operating System
--Desktop/Workstation OS - MSDOS, Windows 10/8.1/8...
NOS:Network Operating System
--Server OS
---Windows server NT,2000,2003,2008,2008R2,2012,2012r2,2016,2019,2022
---Linux(Enterprise Linux 8, 7, 6,...), Unix - HPUX, Solaries 11,10

User and Task

SUST - Single User Sigle Task - MS DOS
SUMT - Single User Multi Task - Windows OSs
MUMT - Mutli User Mutli Task - Linux and Unix
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OS - instructions giving to processor

Assemble language
C lang

BSD

...


UNIX:
-not a open source
-less distributions than linux
HP - HPUX
IBM
Mainframes -
Sun Microsystem - solaris
POXI -- Linux

Linus Torvalds
-took some part of Unix kernel develop Linux kernel
-make linux as open source
--any one can take linux kernel develop their own OS and distribute OS also

current linux kernel version - stable: 5.16.7
(https://www.kernel.org/)
Protocol Location
HTTP https://www.kernel.org/pub/
GIT https://git.kernel.org/
RSYNC rsync://rsync.kernel.org/pub/

GPL - General Public License

GNU - GNU not Unix

How to check your kernel version?
uname -r

-Case sensitive

Differences:

Windows and Linux

Linux and Unix
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