# My step towards linux !!!

Hello Everyone!! I'm Sejal Marawade. This blog series is all about the basic concepts of linux operating system. As today I attended my first ever workshop organised by Mr. @[Pranav Jambare](@AutomateMaster) (DevOps Engineer , Tcs )

These are the concepts were been taught at day-1 (10th July,2023) of the workshop.

### Table of contents

Operating System:

Introducing linux :

Evolution:

Benefits :

Architecture of linux:

Yaking , Redirection & modes:

## `Operating System`:

• Operating system is the interface between computer and hardware.

• Operating system is software that directly manages a system's hardware & resources like CPU, memory, storage .

•E.g. Windows, Fedora, Mac, Ubuntu, Redhat, Suse, etc.

## `Introducing linux` :

Linux is an open-source operating system. It is created in the early 1990s by Linus Torvalds.The full form of LINUX is Lovable Intellect Not Using XP. Linux is an open-source operating system for servers, computers, mainframes, mobile systems, and embedded systems. Ubuntu, Fedora, Debian, openSUSE, and Red Hat are some examples of linux.

## `Evolution` :

•1969 -: Unix developed by AT & T

• 1973 -: Unix written in C

• 1974 -: Unix released for educational purpose

• 1975 - 1979 -: 6th and 7th edition

• 1983 -: System V accepted as standard OS

• 1987 -: SCO reported record distribution of Xenix

• 1990 -: UnixWare developed

• 1993 -: Berkeley stopped further Unix development

• 1996 -: Over 20+ distribution

In the year 1991, Linus Torvalds invented Linux.

## `Benifits of linux` :

• Free.

• 0pensource.

• Secure.

• Low level resources support.

• Customization.

• Privacy.

• Perfect for programmers.

• Updates.

• Variety of distribution.

• Better community support.

## Architecture of linux :

![Linux Architecture](https://www.interviewbit.com/blog/wp-content/uploads/2022/06/Linux-Architecture-1024x728.png align="center")

The diagram illustrates the structure of the Linux system, according to the layers concept.

<mark>Shell</mark> : It is a terminal used to run command.

<mark>Kernel</mark> : It is the interpreter for communication of shell and hardware. If it gets crashed, complete OS gets crashed.

## `Hierarchy of Linux file` :

![Linux File System Structure Filesystem Hierarchy Module 1.3](https://tekneed.com/wp-content/uploads/2019/12/module-1.3.jpg align="left")

## `Yaking`:

It typically refers to the activities like copy, past, delete, etc. which takes place in the terminal, it can be done with certain commands.

Here are some commands.

<mark>/&lt;word&gt; </mark> \- To search a word.

Note : To find next word press 'n'.

<mark>yy</mark> - Copy.

<mark>P </mark> \- paste

<mark>dd</mark> - Cut or delete

<mark>cc</mark> - Going on insert mode

<mark>gg</mark> - Beginning of the file from present line.

<mark>G</mark> - Go to last line

<mark>:&lt;line_number&gt;</mark> - Going to any specific line number.

<mark>:set</mark> <mark>nu</mark> - To display line number.

<mark>:!&lt;command&gt;</mark> - To run command in a file.

<mark>:%s/xyz/abc/g</mark> - To replace all xyz present with abc.

<mark>:wq!</mark> - To save and quit.

## `Redirection`:

Redirection allows you to redirect input and output of commands, whether you want to store the error into the error file or want to display it.

1\. Find / -user &lt;username&gt;

2\. Find / -user &lt;username&gt; 2&gt; &lt;errorfile&gt;

3\. Find / -user &lt;username&gt; &gt; &lt;o/p file&gt;

4\. Find / -user &lt;username&gt; &gt; &lt;o/p file&gt; 2&gt; &lt;errorfile&gt;

5\. Find / -user &lt;username&gt; &&gt; /dev/

## `Modes :`

•Insert mode

•Save and exit

•Visual / Block

•Escape mode

This topics were covered in this session.

Thank you for reading my blog.