Basic of Linux | Basic Linux Commands

So Let's Start The Journey 🚀

Introduction to Linux

Linux is an Open Source Operating System Modelled on Unix, and Developed in C Language.

So here is the term Open Source Software(OSS) What Does it Mean?

Open Source Operating System

Open Source Software is Software Which Distributed for modification

• It Can be Changed, Modified, or Updated or it can be made in such a way for their need which is done by Programmer, Developer.

• It offers a valuable learning opportunity for programmers.

• More Secure(By Identifying Bug and Fixed)

• Used For Long Term Projects

Benefit of Linux

• Security is Top-Notch

• Allows Multi-User & Multi-Tasking

• Powerful Shell and Multiple Flavours(Flavours Like Ubuntu, Kali-Linux, Red Hat,

  Cent-OS)....etc.

• Update come Frequently

• License Freedom to reuse and re-publish the code.

• Reduce the Monitoring Cost

• Huge Base of developers that freely provide support.

Linux Architecture

Kernel (It is a Heart of OS). Shell is the interface which allows to talk with Kernel.

(To Talk With Kernel we need Sheel) Sheel -------> Kernel ----> Hardware

How to Use Linux

Basically There are some ways by which you can use Linux on your pc

1st way is By using Cloud Services like (Amazon AWS Ec2 and Azure)

2nd way by using VM(Virtual Machine)

Basic Linux Commands

Linux -> Everything work in Directory

Directory -> folder Structure

Linux starts with /

Root / file contain

clear to clear entire Screen in Your Terminal.

pwd it shows the present working Directory ,to check in which folder/path you are in.

mkdir (make a Directory) to make a folder.

ls list (to check which file/folder are there/present in that path).

whoami to check current login user.

touch xyz.txt touch touch command is used to create a file

touch python react js to create multiple files.

touch books{1..N} to create 1 to N num of files

mkdir xyz{1..N} to create multiples dir

mkdir -p xyz/abc/def to make dir inside a dir / make a nested directory

echo "hello world" -> Hello World to print something.

echo "hello world" > hello.txt to print/add something in file.

cat hello.txt -> hello world to see what contents are there in that file.

cd mean change Directory

cd .. to go previous path

cd xyz to go inside that xyz folder

cd / to go inside root user

history shows what command you have written till now in that terminal.

uname It shows the Kernel(Os) name.

uname -r it shows the version of Kernel.

date it show the date

To move a file to a folder/ one place to another places . suppose their are 1 folder and 2 files (devops and hello.txt, helo.txt) we want helo.txt should go to the devops folder.

mv helo.txt devops/ and your file is in that devops folder

ls -a This will list all the files and directories in the current directory, including the hidden ones, with their respective permissions, owner, size, and modification time.

Thank you for reading! :)🐧

Saumya Ranjan Mohapatra