📚 Topics Covered

Linux System-Level Commands

I practiced the following commands:

• uname – Displays system information.

• uptime – Shows how long the system has been running.

• date – Displays the current date and time.

• who – Lists logged-in users.

• whoami – Displays the current user.

• which – Finds the location of a command.

• id – Shows user ID (UID), group ID (GID), and groups.

2. Understanding sudo

I learned how to use sudo to execute commands with administrator (root) privileges. Many system administration tasks require elevated permissions.

Linux Package Managers

I learned about different Linux package managers:

• apt – Ubuntu/Debian

• yum – CentOS/RHEL

• dnf – Fedora/RHEL

Linux User Management

Today I also practiced:

• Creating users using useradd

• Setting passwords with passwd

• Switching users using su

• Deleting users using userdel

• Viewing user information stored in /etc/passwd

💻 Hands-on Practice

I performed all the above exercises on an AWS EC2 Ubuntu instance.

Some commands I practiced:

• uname

• uptime

• date

• who

• whoami

• which

• id

• sudo

• useradd

• mpasswd

• su

• userdel

• cat / etc /passwd

• apt

🎯 Key Takeaways

• Learned the purpose of Linux system commands.

• Understood how Linux user accounts are managed.

• Gained hands-on experience with AWS EC2.

• Strengthened Linux fundamentals for DevOps.

Thank you for reading! I'm excited to continue learning and sharing my progress every day.

Practice

🎯 Conclusion

Today, I strengthened my Linux fundamentals by learning system-level commands, user management, and package managers. I also practiced these concepts on an AWS EC2 instance, which gave me hands-on experience with Linux in a real cloud environment. I'm excited to continue learning and sharing my DevOps journey.

Thank you for reading!

📂 GitHub Repository

You can find all my notes, practice files, and screenshots from my 90-Day DevOps Journey

here: 🔗 GitHub: https://github.com/Laxmipatil5034/DevOps-Journey⁠

If you have any suggestions or feedback, feel free to share them. Thank you for your support! 🚀

#DevOps #Linux #AWS #EC2 #LearningInPublic #Hashnode #GitHub #CloudComputing #90DaysOfDevOps

Hello everyone! 👋 I have started my #90DaysOfDevOps challenge to build strong DevOps skills. During the first seven days, I focused on understanding the fundamentals before moving into Linux administration. I believe building a strong foundation is the key to becoming a successful DevOps Engineer.

Day 1 – Computer Fundamentals

Topics Covered

• Computer Architecture

• CPU

• Memory

• HDD vs SSD

• Operating System

• Input Devices

• Output Devices

• Types of Computers

What I Learned

Understanding how computers work makes learning Linux, Cloud, and DevOps much easier.

📅 Day 2 – DevOps Basics

Topics Covered

• What is DevOps?

• DevOps Lifecycle

• CI/CD

• Automation

• Why DevOps Matters

• Benefits of DevOps

Key Takeaways

• Faster software delivery

• Better collaboration

• Continuous Integration

• Continuous Deployment

📅 Day 3 – Software Development Life Cycle (SDLC)

Topics Covered

• What is SDLC?

• Waterfall Model

• Agile

• Scrum

• DevOps in SDLC

What I Learned

I understood how software is planned, developed, tested, deployed, and maintained.

📅 Day 4 – Linux Basics

Commands Practiced

pwd
ls
cd
mkdir
touch
rm
rmdir
cp
mv
cat
head
tail
less
more

📅 Day 5 – Linux File Management

Practiced

• Creating files

• Copying files

• Moving files

• Deleting files

• Viewing files

• Directory navigation

📅 Day 6 – Linux File Utilities

Commands Learned

ln
cut
tee
sort
diff
wc
vi

Key Learnings

• Hard Link

• Soft Link

• Text Processing

• File Comparison

• Editing files using vi

📅 Day 7 – Linux Process Management & System Monitoring

Commands Practiced

ps
top
kill
free
free -h
ssh
fuser
nohup
vmstat

What I Learned

• Monitor processes

• Kill unwanted processes

• Check memory usage

• Remote server access using SSH

• Understand virtual memory

Practice Screenshots :

Day-01 Computer Fundamentals Practice :

Day-02 DevOps Basics Practice :

Day-05 Linux Practice :

Day-06 Linux Practice :

Day-07 Linux Command Practice in Cloud Shell :

📚 GitHub Repository

All my notes, screenshots, and practice files are available here:

👉 https://github.com/Laxmipatil5034/DevOps-Journey

🎯 What's Next?

In the upcoming days, I will be learning:

• Shell Scripting

• Git & GitHub

• AWS

• Docker

• Kubernetes

• Jenkins

• Terraform

• Ansible

• CI/CD Projects

Final Thoughts

The first seven days have given me a strong foundation in Computer Fundamentals, DevOps concepts, SDLC, and Linux. I look forward to learning more, building real-world projects, and documenting my progress throughout this journey.

#90DaysOfDevOps #DevOps #Linux #GitHub #CloudComputing #AWS #LearningInPublic #OpenSource #Tech #SoftwareEngineering

Thank you for reading! 🚀