What is Linux

Linux is a free and open-source operating system that's like Windows or macOS but with a penguin mascot! It was created by Linus Torvalds in 1991 and has become super popular! It's powerful, customizable, and loved by tech enthusiasts. So, if you're curious about exploring a new world of computing freedom, Linux is the way to go!

Linux has Multiple Versions-:

1. UBUNTU

2. FEDORA

3. KALI LINUX (Mostly used for Hacking)

4. REDHAT

5. CENTOS

6. SUSE

Basic Linux commands

Navigating files system

ls: List files and directories in the current location

  ls [options] [directory]

cd: Change the directory to navigate through different folders.

cd [directory]

pwd: it shows working directory

  pwd

Working with Files and Directories

mkdir: Create a new directory

  mkdir [directory]

touch: Create a new empty file

touch [filename]

cp: Copy files and directories

cp [options] [source] [destination]

mv: Move or rename files and directories.

mc [options] [source] [destination]

rm: Remove files and directories

rm [options] [file/directory]

File and Text manipulation

cat: Display the content of file.

cat: Display the content of the file.

cat [filename]

head: Display the first lines of a file.

Syntax: head [OPTIONS][FILE]

Example

head -n 10 myfile.txt

In the example above, -n 10 tells that you want to display the first 10 lines of the file.

tail: Display the last few lines of a file.

  tail [options] [file]

Example

tail -n 10 file.txt

The example above displays the last 10 lines of the files ''file.txt'

System Administration

sudo: Executes a command with administrative privileges

sudo [command]

• apt-get (for Debian-based distros) or dnf (for Fedora-based distros): Package management commands for installing, updating, and removing software.

• sudo apt update: Used to update the package index files to get the latest list of available packages in the repositories.

sudo apt update

User and Permission Management

Whoami: Print the current username

whoami

passwd: change password of the current user.

passwd

useradd: Add new user

useradd [options] username

Why Linux is perfect for DevOps?

One of the key benefits of it is open source..!

It means that anyone can contribute to its development. Linux and DevOps both have the same goals which is Scalability. Scalability lets you deliver the software faster.

Some key features which are the cherry on top are it a Free, customizable, Light and very much popular.

Linux gives flexibility to the DevOps team with the flexibility needed to develop a fluid development process. You can configure it as per your requirements instead of letting the operating system decide what you do.