Baijnath's blog

File Permissions and Access Control Lists

Baijnath Mahto — Fri, 26 Jan 2024 17:52:31 GMT

Working with Linux File Permissions and Ownership

In the Linux operating system, file permissions and ownership are crucial aspects of security and access control. Properly managing these elements ensures the integrity and confidentiality of files and directories. Let's delve into the concepts of Linux permissions and ownership and perform some tasks.

Creating a Simple File

touch sample_file.txt

This command creates a new file named sample_file.txt. To view details, use:

ls -ltr

File Permissions

Linux provides three levels of permissions for files and directories: owner, group, and others.

Owner: The user who owns the file or directory.
Group: A set of users with common permissions.
Others: All other users who are neither the owner nor in the group.

Changing Ownership (chown)

The chown command is used to change the ownership of a file or directory.

chown new_owner:new_group sample_file.txt

Changing Group (chgrp)

The chgrp command changes the group ownership of a file or directory.

chgrp new_group sample_file.txt

Changing Permissions (chmod)

The chmod command modifies the permissions of a file or directory.

chmod u+rwx,g+rw,o+r sample_file.txt

This command grants read, write, and execute permissions to the owner, read and write permissions to the group, and read permission to others.

Observing Changes

After performing these operations, you can verify the changes using:

ls -ltr

Article: Understanding Linux File Permissions

Linux file permissions follow a comprehensive system that controls who can access, modify, or execute files and directories. Each permission (read, write, execute) can be assigned to three user categories: owner, group, and others.

Owner

The owner is the user who initially creates the file or directory. They have the highest level of control and can change permissions, ownership, and group.

Group

A group is a set of users who share common permissions. It provides a way to grant access to multiple users simultaneously.

Others

The "others" category includes all users who are neither the owner nor in the group. It ensures a comprehensive yet granular control structure.

Changing Ownership (chown)

The chown command allows for changing the ownership of a file or directory. This is particularly useful in scenarios where file management responsibilities need to be transferred.

Changing Group (chgrp)

chgrp changes the group ownership of a file or directory. It enables the assignment of a different group to a file, providing flexibility in access control.

Changing Permissions (chmod)

chmod is a powerful command to modify file permissions. It uses a numeric or symbolic representation to grant or revoke permissions for the owner, group, and others.

Access Control Lists (ACL)

Linux also supports Access Control Lists (ACLs), an extension to the traditional permissions. ACLs provide a more fine-grained control system, allowing specific users or groups additional access beyond the standard read, write, and execute.

Using getfacl and setfacl

getfacl: Displays the ACLs associated with a file or directory.
```
  getfacl sample_file.txt
```

setfacl: Modifies the ACLs for a file or directory.

  setfacl -m u:username:permissions sample_file.txt

Conclusion

Understanding Linux file permissions and ownership is fundamental for maintaining a secure and organized system. The ability to assign specific permissions to different user categories ensures a balanced and controlled access environment. Additionally, the introduction of ACLs provides advanced access management capabilities, making Linux a versatile and secure operating system.

Advanced Linux Shell Scripting for DevOps Engineers with User management

Baijnath Mahto — Wed, 24 Jan 2024 15:32:09 GMT

Tasks:

You have to do the same using Shell Script i.e using either Loops or command with start day and end day variables using arguments -

So Write a bash script create directories.sh that when the script is executed with three given arguments (one is the directory name and second is start number of directories and third is the end number of directories ) it creates a specified number of directories with a dynamic directory name.

#!/bin/bash

# Check if the correct number of arguments is provided
if [ "$#" -ne 3 ]; then
    echo "Usage: $0   "
    exit 1
fi

# Assign arguments to variables
prefix=$1
start=$2
end=$3

# Loop to create directories
for ((i = start; i <= end; i++)); do
    mkdir "${prefix}${i}"
done

echo "Directories created successfully!"

Save the above script as createDirectories.sh and make it executable:

chmod +x createDirectories.sh

Now you can execute the script with the desired arguments, for example:

./createDirectories.sh day 1 90

This will create directories named day1, day2, ..., day90.

Or you can execute it with different arguments:

./createDirectories.sh Movie 20 50

This will create directories named Movie20, Movie21, ..., Movie50.

Create a Script to backup all your work done till now.

Create a backup script (backupScript.sh):

#!/bin/bash

# Directory to be backed up
backup_source="/path/to/your/work/directory"

# Backup destination directory
backup_dest="/path/to/backup/destination"

# Create a timestamp for the backup file
timestamp=$(date +"%Y%m%d%H%M%S")

# Create a compressed archive
tar -czvf "${backup_dest}/backup_${timestamp}.tar.gz" "$backup_source"

echo "Backup completed successfully!"

Make sure to replace "/path/to/your/work/directory" and "/path/to/backup/destination" with your actual work directory and desired backup destination.

Make the script executable:

chmod +x backupScript.sh

Execute the script:

./backupScript.sh

This script will create a compressed backup archive with a timestamp in the filename and save it to the specified backup destination directory.

Read About Cron and Crontab, to automate the backup Script

Cron is a time-based job scheduler in Unix-like operating systems. It allows users to schedule jobs (commands or scripts) to run periodically at fixed times, dates, or intervals. The configuration file for cron is called crontab (short for "cron table"), and it holds the schedule information for each user.

Here's a brief overview of how to use Cron and Crontab to automate your backup script:

Using Crontab:

Edit the crontab file: Open the crontab editor by running the following command:
```
 crontab -e
```
Schedule the backup script: Add a line to specify when you want the backup script to run. The general format is:
```
 minute hour day month day_of_week command_to_run
```
For example, to run the backup script every day at 2:00 AM, add the following line:
```
 0 2 * * * /path/to/backupScript.sh
```
Save and exit the editor.
Verify the crontab entries: You can view the scheduled jobs by running:
```
 crontab -l
```
This will list the current cron jobs for the user.

Cron Schedule Syntax:

*: Wildcard, matches any value.
*/X: Runs every X units (e.g., */5 in the minute field means every 5 minutes).
X-Y: Specifies a range (e.g., 1-5 in the day field means from the 1st to the 5th day of the month).

Read About User Management

User management in Linux involves creating, modifying, and deleting user accounts, as well as managing user permissions and groups. Here are some key concepts and commands related to user management in Linux:

Creating a User: To create a new user, you can use the adduser or useradd command:
```
 sudo adduser username
```
Replace "username" with the desired username.
Changing User Password: You can set or change a user's password using the passwd command:
```
 sudo passwd username
```
Replace "username" with the actual username.
Adding a User to a Group: To add a user to a specific group, you can use the usermod command:
```
 sudo usermod -aG groupname username
```
Replace "groupname" with the name of the group and "username" with the actual username.
Listing Users: To list all users on the system, you can use the getent command or check the /etc/passwd file:
```
 getent passwd
```
Displaying User Information: To display detailed information about a user, you can use the id or finger command:
```
 id username
```

Create 2 Users and just display their Usernames

the commands to create two users and display their usernames:

# Create users
sudo adduser user1
sudo adduser user2

# Display usernames
echo "User 1: $(getent passwd user1 | cut -d: -f1)"
echo "User 2: $(getent passwd user2 | cut -d: -f1)"

Explanation:

sudo adduser user1 and sudo adduser user2: These commands create two users named "user1" and "user2". You'll be prompted to set passwords and provide additional information during the user creation process.
echo "User 1: $(getent passwd user1 | cut -d: -f1)" and echo "User 2: $(getent passwd user2 | cut -d: -f1)": These commands display the usernames of the newly created users. The getent passwd command fetches user information from the /etc/passwd file, and cut -d: -f1 extracts the username from the output.

Basic Linux Shell Scripting for DevOps Engineers.

Baijnath Mahto — Tue, 23 Jan 2024 17:47:01 GMT

What is kernel ?

The kernel is a core component of an operating system that acts as an intermediary between the computer's hardware and software applications. It provides essential services for the functioning of the computer system and manages system resources. The kernel is the first layer of software loaded into memory during the boot process.

Key functions of the kernel include:

Process Management: The kernel manages processes, which are the running instances of programs. It allocates resources, schedules processes, and ensures their proper execution.
Memory Management: The kernel handles the allocation and deallocation of memory for programs and data. It ensures that each process has the necessary memory space and protects processes from interfering with each other's memory.
File System Management: The kernel manages the file system, including reading and writing data to storage devices, organizing files and directories, and handling file permissions.
Device Drivers: The kernel includes device drivers, which are software components that enable communication between the operating system and hardware devices such as disk drives, network cards, and printers.
System Calls: The kernel provides an interface for applications to interact with system resources through system calls. These calls allow applications to request services from the kernel, such as reading or writing to files, creating new processes, or allocating memory.
Security and Access Control: The kernel enforces security policies and access control mechanisms to protect the system and its resources from unauthorized access and malicious activities.

What is Shell?

A shell is a user interface that allows access to the services of an operating system. It can be a command-line interface (CLI) or a graphical user interface (GUI). The shell interprets user commands and communicates with the operating system to execute those commands.

In the context of Linux and Unix-like systems, the term "shell" often refers to the command-line shell, which is a program that provides a text-based interface for users to interact with the operating system. Users can enter commands, and the shell interprets and executes those commands.

Common Unix/Linux shells include:

Bash (Bourne Again SHell): A widely used shell that is the default on many Linux distributions.
sh (Bourne Shell): The original Unix shell, still available on many systems.
zsh (Z Shell): An extended version of the Bourne Shell with many enhancements.
csh (C Shell): Known for its C-like syntax.
fish: A user-friendly shell with syntax highlighting and other features.

Each shell may have its own features, syntax, and capabilities, but they all provide a way for users to interact with the underlying operating system through the command line. Shell scripting involves writing scripts (sequences of commands) that the shell can execute, automating various tasks in the system.

What is Linux Shell Scripting?

Linux Shell Scripting involves writing a series of commands in a script file that can be executed by a shell. These scripts automate repetitive tasks, execute multiple commands sequentially, and can include conditional statements and loops. Shell scripting is a powerful tool for system administrators, developers, and anyone looking to automate tasks in a Linux environment.

Shell Scripting for DevOps:

In the context of DevOps, shell scripting plays a crucial role in automating deployment processes, configuration management, and other repetitive tasks. DevOps emphasizes collaboration and communication between development and operations teams, and automation is a key aspect to achieve efficiency and reliability. Shell scripts can be used to automate deployment pipelines, manage infrastructure, and perform system configurations, making the development and deployment processes more streamlined and consistent.

#!/bin/bash and #!/bin/sh:

The #!/bin/bash is called a shebang or hashbang. It indicates the path to the interpreter that should be used to execute the script. In this case, it specifies that the Bash shell should be used. Yes, you can use #!/bin/sh as well, indicating the Bourne Shell. However, note that different shells may have slightly different syntax and features, so choosing the appropriate shebang is important.

Shell Script to Print a Message:

#!/bin/bash
echo "I will complete the #90DaysOfDevOps challenge."

Shell Script to Take User Input and Print Variables:

#!/bin/bash
echo "Enter your name:"
read username

echo "Enter your age:"
read age

echo "Hello, $username! You are $age years old."

Example of If-Else in Shell Scripting:

#!/bin/bash

echo "Enter the first number:"
read num1

echo "Enter the second number:"
read num2

if [ $num1 -eq $num2 ]; then
  echo "Both numbers are equal."
elif [ $num1 -gt $num2 ]; then
  echo "$num1 is greater than $num2."
else
  echo "$num1 is less than $num2."
fi

Basic Linux Commands

Baijnath Mahto — Mon, 22 Jan 2024 18:00:51 GMT

Task: What is the Linux command??

The term "Linux command" refers to a command-line instruction or a series of commands used in a Linux operating system. Linux is a Unix-like operating system, and one of its strengths lies in its command-line interface, where users can interact with the system by typing commands.

Linux commands are entered in a terminal or shell, and they perform various tasks such as file manipulation, process management, system configuration, and more. These commands are case-sensitive and often consist of a command name followed by options and arguments.

To view what's written in a file:
```
 cat filename
```
To change the access permissions of files:
```
 chmod permissions filename
```
To check which commands you have run till now:
```
 history
```
To remove a directory/ Folder:
```
 rm -r directoryname
```
To create a fruits.txt file and to view the content:
```
 touch fruits.txt
 cat fruits.txt
```
Add content in devops.txt (One in each line) - Apple, Mango, Banana, Cherry, Kiwi, Orange, Guava:
```
 echo -e "Apple\nMango\nBanana\nCherry\nKiwi\nOrange\nGuava" > devops.txt
```
To show only the top three fruits from the file:
```
 head -n 3 devops.txt
```
To show only the bottom three fruits from the file:
```
 tail -n 3 devops.txt
```
To create another file Colors.txt and to view the content:
```
 touch Colors.txt
 cat Colors.txt
```
Add content in Colors.txt (One in each line) - Red, Pink, White, Black, Blue, Orange, Purple, Grey:
```
echo -e "Red\nPink\nWhite\nBlack\nBlue\nOrange\nPurple\nGrey" > Colors.txt
```
To find the difference between fruits.txt and Colors.txt file:
```
diff fruits.txt Colors.txt
```

Introduction To Linux

Baijnath Mahto — Sun, 21 Jan 2024 18:27:20 GMT

Table of Contents

What is Linux?

Linux is an open-source, Unix-like operating system kernel initially created by Linus Torvalds in 1991. As the heart of various Linux distributions (distros), it serves as the core component that manages system resources, facilitates communication between hardware and software, and provides a foundation for building complete operating systems.

Why Linux?

Open Source: Linux is distributed under open-source licenses, allowing users to view, modify, and distribute the source code. This fosters a collaborative development model and encourages community contributions.
Stability and Reliability: Linux is known for its stability and reliability. It is widely used in server environments, where uninterrupted operation is crucial.
Security: Linux has a robust security model, with features such as user privileges, file permissions, and a comprehensive set of security tools. Regular updates and a proactive community contribute to its security strength.
Variety of Distributions: While Linux itself is a kernel, various distributions package it with different software components to create complete operating systems. Examples include Ubuntu, Fedora, Debian, and CentOS.
Flexibility and Customization: Linux provides a high degree of customization. Users can choose from various desktop environments, software packages, and configurations to tailor the system to their needs.
Command Line Interface (CLI): Linux offers a powerful command-line interface, allowing users to interact with the system through text commands. This flexibility is appreciated by both beginners and experienced users.

Applications

Linux is a versatile operating system with a wide range of applications across various domains. Some of the key applications of Linux include:

Server Environments:
- Linux is a dominant force in server environments. Many web servers, database servers, and application servers run Linux due to its stability, reliability, and strong performance.
Web Hosting:
- Linux is widely used for hosting websites and web applications. Popular web hosting solutions, such as Apache and Nginx, run on Linux servers.
Cloud Computing:
- Leading cloud platforms, including Amazon Web Services (AWS), Microsoft Azure, and Google Cloud Platform (GCP), offer Linux-based virtual machines and container services for scalable and flexible cloud computing.
Networking:
- Linux is extensively used in networking infrastructure. Routers, switches, firewalls, and other network devices often run Linux-based operating systems.
Security Systems:
- Linux is a preferred choice for security-focused applications. Many cybersecurity tools and distributions, such as Kali Linux, are based on Linux to perform penetration testing, forensics, and security analysis.

File System Hierarchy

The File System Hierarchy Standard (FHS) is a set of conventions and rules outlining the structure of the file system on Unix-like operating systems, including Linux.

/ (Root):
- The root directory is the top-level directory in the file system hierarchy. All other directories and files are subdirectories or files within the root directory.
/bin (Binaries):
- Essential command binaries (executable files) are stored in this directory. These binaries are required for system recovery and repair.
/boot:
- The boot directory contains files needed for the system boot process, including the kernel, initial RAM disk (initrd), and boot loader configuration files.
/dev (Devices):
- Device files representing hardware devices or pseudo-devices are stored in this directory. These files allow interaction with hardware components.
/etc (Configuration):
- Configuration files and directories are located in /etc. These files contain system-wide configuration settings for various applications and services.
/home:
- Home directories for regular users are created under /home. Each user has a subdirectory here for personal files and settings.

Basic of Linux commands

ls (List):
- Lists the contents of a directory.
- ```
  Copy codels
```
cd (Change Directory):
- Changes the current working directory.

    cd directory_path

pwd (Print Working Directory):
- Displays the current working directory.

pwd

mkdir (Make Directory):
- Creates a new directory.

    mkdir directory_name

cp (Copy):
- Copies files or directories from one location to another.

    cp source destination

mv (Move):
- Moves or renames files and directories.

    mv source destination

rm (Remove):
- Removes files or directories. Be cautious, as this action is irreversible.

    rm file_name

touch:
- Creates an empty file or updates the access and modification timestamps of an existing file.

    touch file_name

cat (Concatenate):
- Displays the content of a file.

    cat file_name

more and less:
- Display the contents of a file one screen at a time. less provides more features than more and allows scrolling.

    more file_name
    less file_name

head and tail:
- Display the beginning or end of a file, respectively.

    head file_name
    tail file_name

nano or vim (Text Editors):
- Opens a text editor for creating or editing files.

    nano file_name
    vim file_name

Introduction To DevOps

Baijnath Mahto — Sat, 20 Jan 2024 08:44:28 GMT

What is DevOps?
What is Automation?
What is scaling?
What is infrastructure?
Advantages of DevOps
Conclusion

What is DevOps?

DevOps, a combination of "development" and "operations".

DevOps is like a teamwork approach that brings together developers (who create software) and operations teams (who manage the software once it's running). The goal is to make them work closely and communicate better.

DevOps uses certain practices and principles to make this collaboration smoother, and it's all about creating a culture where everyone works together to make software development and operations more efficient.

The primary goal of DevOps is to streamline the software development and delivery processes, enabling organizations to deliver high-quality software more rapidly, reliably, and efficiently.

What is Automation?

Automation refers to the use of technology and systems to perform tasks or processes without direct human intervention. The goal of automation is to streamline repetitive, time-consuming, and error-prone tasks, allowing humans to focus on more complex and creative aspects of their work.

examples

Automated Testing:
- Writing scripts to test software applications automatically. This ensures that code changes don't introduce new bugs, and it speeds up the testing process.
Continuous Integration (CI):
- Automatically integrating code changes into a shared repository and running automated tests. This helps identify and address issues early in the development process.
Continuous Deployment (CD):
- Automatically deploying code changes to production after passing all tests in the continuous integration pipeline.
Configuration Management:
- Using tools like Ansible, Puppet, or Chef to automate the setup and configuration of servers and infrastructure.

What is Scaling?

Scaling refers to the ability to handle an increasing amount of work or demand. It involves adapting resources to accommodate growth, ensuring that a system remains responsive and performs well as workload or user numbers increase. Scaling is crucial for systems to handle larger data sets, user bases, or transaction loads without sacrificing performance.

Types of Scaling:

Vertical Scaling (Scale-Up):
- Description: Involves increasing the capacity of a single machine or server by adding more resources (CPU, RAM, storage).
- Example: Upgrading a server by adding more RAM or swapping out the CPU for a more powerful one.
Horizontal Scaling (Scale-Out):
- Description: Involves adding more machines or servers to distribute the load, often in a clustered or distributed environment.
- Example: Adding more web servers to a load balancer to handle increased web traffic.

Infrastructure

Infrastructure, in the context of information technology (IT), refers to the foundational elements that support the operation of software applications and services. It includes hardware components, software, networks, storage, and other resources necessary for the development, deployment, and operation of IT systems.

Types of Infrastructure:

Physical Infrastructure:
- Description: Physical hardware components such as servers, storage devices, networking equipment, and data centers.
- Example: Rack-mounted servers, network switches, and storage arrays.
Virtual Infrastructure:
- Description: Abstracting physical hardware to create virtualized environments, allowing multiple virtual machines (VMs) to run on a single physical server.
- Example: VMware, Hyper-V, and KVM for server virtualization.
Cloud Infrastructure:
- Description: Providing computing resources (servers, storage, networking) over the internet as services, often in a pay-as-you-go model.
- Example: Amazon Web Services (AWS), Microsoft Azure, Google Cloud Platform (GCP).

Advantages of DevOps

Faster Time-to-Market:
- Advantage: DevOps enables faster delivery of software products and features by streamlining and automating the development, testing, and deployment processes.
Improved Collaboration:
- Advantage: DevOps breaks down silos between development and operations teams, fostering better collaboration and communication. This leads to more efficient problem-solving and innovation.
Continuous Integration and Continuous Deployment (CI/CD):
- Advantage: CI/CD pipelines automate the testing, integration, and deployment of code changes, ensuring faster and more reliable releases with reduced manual errors.
Increased Efficiency and Productivity:
- Advantage: Automation of repetitive tasks and manual processes increases overall efficiency, allowing teams to focus on higher-value activities and innovation.
Enhanced Quality and Stability:
- Advantage: DevOps practices emphasize automated testing and continuous monitoring, leading to higher-quality software with fewer defects and improved stability in production environments.
Infrastructure as Code (IaC):
- Advantage: IaC allows for the automation and versioning of infrastructure, enabling consistent and repeatable deployments. This reduces configuration drift and minimizes errors.
Scalability and Flexibility:
- Advantage: DevOps practices support the scaling of infrastructure and applications to meet changing demands. Cloud services and containerization contribute to increased flexibility and scalability.

Conclusions

DevOps is not just a set of tools; it's a cultural shift that encourages collaboration, transparency, and a focus on delivering value to end-users. Organizations that successfully implement DevOps practices can benefit from faster time-to-market, improved product quality, and increased agility in responding to changing business requirements.

DevOps Journey: Navigating the Coding Cosmos | A Call to the Community

Baijnath Mahto — Sat, 20 Jan 2024 07:42:07 GMT

DevOps Explorer: A 90-Day Expedition into Continuous Excellence

Hello DevOps Enthusiasts! I am excited to share with you the beginning of my DevOps journey. In this inaugural post, I want to invite you all to join me on this adventure into the world of DevOps. Whether you are a seasoned professional or just dipping your toes into the DevOps waters, I believe that this journey will be an enriching experience for all of us.

## Why DevOps?

Why embark on this DevOps journey, you might ask? DevOps represents a transformative approach to software development and IT operations. It's about tearing down the barriers that traditionally separate development, operations, and other teams. It's about automating processes, fostering collaboration, and delivering value to end-users more efficiently.

## What to Expect

Over the next 90 days, I'll be diving deep into various aspects of DevOps. From mastering essential tools like Jenkins, Docker, and Kubernetes, to exploring best practices in continuous integration, continuous delivery, and infrastructure as code — every day will be a step forward in this exciting journey.

## Join the DevOps Community

But this journey is not a solitary one. I invite you to be a part of it! Share your insights, experiences, and questions. Let's build a vibrant community where we learn from each other and support one another in our DevOps endeavors.

## Get Involved

- Follow Along: Hit that "Follow" button to stay updated on my DevOps journey.

- Share Your Wisdom: Whether you're a seasoned DevOps pro or just getting started, share your experiences in the comments.

- Suggest Topics: Is there a particular DevOps topic you'd like me to explore? Let me know!

## Conclusion

As I take the first steps into this exciting realm, I am thrilled to have you all by my side. Together, let's explore, learn, and contribute to the vibrant world of DevOps. Stay tuned for daily updates, challenges, victories, and insights!

Happy DevOps-ing!

Baijnath Mahto

Embarking on a Coding Odyssey: My First Blog Post

Baijnath Mahto — Sat, 20 Jan 2024 07:18:41 GMT

Hello, fellow developers and coding enthusiasts! Welcome to my coding corner on Hashnode. I'm thrilled to kick off this coding odyssey with my very first blog post. Whether you're a seasoned developer or just starting your coding journey, I invite you to join me as we explore the vast and exciting world of programming.

## The Genesis

## Why Coding?

You might wonder, "Why coding?" For me, coding is a powerful tool for creativity and problem-solving. It's a language that allows me to communicate with machines and bring ideas to life. Whether I'm building web applications, solving algorithmic puzzles, or diving into new technologies, each line of code is a step in my coding odyssey.

## What to Expect

## Join the Coding Community

## Conclusion

As I pen down these words, I'm excited about the coding adventures that await us. Thank you for joining me on this journey. Stay tuned for more coding insights, tutorials, and the occasional musings on the developer's life.

Baijnath's blog

File Permissions and Access Control Lists

Creating a Simple File

File Permissions

Changing Ownership (chown)

Changing Group (chgrp)

Changing Permissions (chmod)

Observing Changes

Article: Understanding Linux File Permissions

Owner

Group

Others

Changing Ownership (chown)

Changing Group (chgrp)

Changing Permissions (chmod)

Access Control Lists (ACL)

Using getfacl and setfacl

Conclusion

Advanced Linux Shell Scripting for DevOps Engineers with User management

Tasks:

Using Crontab:

Cron Schedule Syntax:

Basic Linux Shell Scripting for DevOps Engineers.

What is kernel ?

What is Shell?

What is Linux Shell Scripting?

Shell Scripting for DevOps:

#!/bin/bash and #!/bin/sh:

Shell Script to Print a Message:

Shell Script to Take User Input and Print Variables:

Example of If-Else in Shell Scripting:

Basic Linux Commands

Task: What is the Linux command??

Introduction To Linux

What is Linux?

Why Linux?

Applications

File System Hierarchy

Basic of Linux commands

Introduction To DevOps

Table of contents

What is DevOps?

What is Automation?

examples

What is Scaling?

Types of Scaling:

Infrastructure

Types of Infrastructure:

Advantages of DevOps

Conclusions

DevOps Journey: Navigating the Coding Cosmos | A Call to the Community

DevOps Explorer: A 90-Day Expedition into Continuous Excellence

## Why DevOps?

## What to Expect

## Join the DevOps Community

## Get Involved

## Conclusion

Embarking on a Coding Odyssey: My First Blog Post

## The Genesis

## Why Coding?

## What to Expect

## Join the Coding Community

I believe that the best coding experiences are those shared with a community. I invite you to share your thoughts, ask questions, and embark on this coding odyssey with me. Let's create a supportive space where we can learn from each other and celebrate the joys of coding.

## Conclusion

As I pen down these words, I'm excited about the coding adventures that await us. Thank you for joining me on this journey. Stay tuned for more coding insights, tutorials, and the occasional musings on the developer's life.

Happy coding!

\[Baijnath Mahto]