What is Linux? A Beginner's Guide to the OS
What you'll be able to do
- Explain in your own words what Linux is and why it is so widely used
- Tell apart an OS, a kernel, and a distribution
What you will learn
- What Linux is and how it differs from Windows and macOS
- Where Linux is used and why it is essential in the IT industry
- What Linux distributions are and which one to choose as a beginner
Introduction
Conclusion: Linux is a free OS for web, cloud, and Android, built by developers worldwide.
1. What is Linux?
Conclusion: Linux is a free open-source OS with strong security, unlike Windows or macOS.
3 Key Features of Linux
- Free to use: No license fees at all
- Open source: Source code is public and anyone can improve it
- High security: Developers worldwide constantly improve it
History of Linux
2. Differences from Windows and Mac
Conclusion: Linux is more secure than Windows and highly customizable, but harder to learn.
| Aspect | Linux | Windows | macOS |
|---|---|---|---|
| Price | Free | Paid | Included with Mac purchase |
| Development Model | Open source | Developed by Microsoft | Developed by Apple |
| Customizability | Very high | Moderate | Limited |
| Security | Very robust | Antivirus required | Relatively safe |
| Ease of use for beginners | Somewhat challenging | User-friendly | Intuitive |
3. Where Linux is Used
Conclusion: Linux runs web servers, cloud, Android, banks, and supercomputers every day.
Web Services and Servers
- Web servers: Most major sites like Google, Facebook, and Amazon run on Linux
- Cloud services: The majority of AWS, Google Cloud, and Microsoft Azure runs on Linux
Smartphones and IoT
- Android: Android smartphones, which hold the majority of global market share, are Linux-based
- Home appliances and IoT devices: Smart TVs, routers, car systems, etc.
Enterprise and Government
- Banking systems: ATMs and core banking systems
- Stock exchanges: High-speed trading systems
- Supercomputers: The vast majority of the world's supercomputers run Linux
4. Why is Linux Important?
Conclusion: Linux is essential in IT — DevOps and infrastructure roles often depend on it.
Essential Skill in IT Industry
Career Possibilities
Deeper Understanding of Computers
5. Distributions
Conclusion: A Linux distro bundles the kernelThe core program of an OS. It bridges hardware and software. with software; Ubuntu is best for beginners.
Recommended Distributions for Beginners
Ubuntu
The most popular and beginner-friendly. There's plenty of English documentation, making it easy to find help when you're stuck.
Linux Mint
Has a Windows-like feel, making it easy for Windows users to transition.
CentOS / Rocky Linux
Often used for enterprise servers. Highly stable.
6. Advantages and Disadvantages
Conclusion: Linux leads on cost and security, but its learning curve and software gaps hurt.
Advantages
- Completely free: Both OS and software are free
- High security: Low risk of virus infection
- Lightweight and fast: Runs smoothly even on old PCs
- Free customization: Can be adjusted to your preferences
- Privacy protection: No collection of personal data
- Value in IT industry: Skills directly connected to career
Disadvantages
- High learning cost: Many things to learn at first
- Limited software support: Can't use Windows-exclusive software
- Gaming environment: Fewer supported games than Windows
- Technical documentation: Can be challenging for beginners
- Some hardware compatibility: Drivers may not be available
Lina Tries It Herself
Conclusion: Penguin Gym Linux is already running as a virtual Linux environment, so you don't need to type a distribution name to start it.
ubuntu in Penguin Gym Linux would get me started. Let me try it!$ ubuntu
bash: ubuntu: command not found
ubuntu is the name of a distribution. It's not a command.pwd first. It should show you where you are right now.Mini Exercises
Conclusion: Check your phone OS, spot Linux behind web services, and run pwd in Penguin Gym.
Exercise 1: Check Your Smartphone's OS
Task: Check if your smartphone is Android or iPhone. If it's Android, you already use a Linux-based system every day.
Show Hint 1 (Direction)
Somewhere in your phone's "Settings" app, there's a screen that shows your device and OS information. Look for it.
Show Hint 2 (Where to check)
Open "Settings" → "About phone" (some phones say "Device information"). The OS name should appear there.
Show Answer
On Android, "Settings" → "About phone" shows the OS name. This is a Linux-based OS. On iPhone, it shows iOS instead, which is not Linux-based.
Exercise 2: Think About What's Behind Web Services
Task: Name 3 web services you use regularly, and think about what runs behind each one.
Show Hint 1 (Direction)
Recall the web services and cloud services mentioned in this article.
Show Hint 2 (How to think about it)
Picture services you use often, like Google, YouTube, or Amazon. What OS runs on their servers?
Show Answer
Most of these services, like Google, YouTube, and Amazon, run on Linux servers behind the scenes. Linux is used every day, even when we don't notice it.
Exercise 3: Run pwd in Penguin Gym Linux
Task: Execute the pwd command on Penguin Gym Linux and experience the Linux world.
Show Hint 1 (Direction)
Try to recall the command that shows "where you are right now" on screen. Linny-senpai already mentioned it in the example above.
Show Hint 2 (Command name)
Use pwd. Type it in lowercase.
Show Answer
$ pwd
/home/user
Review
Conclusion: Linux is free and open-source, powering Android, web, and cloud platforms daily.
3-Line Summary
Conclusion: Linux runs behind Android, web, and cloud. Worth learning for anyone in IT.
- Linux is a free, open-source OS improved by developers worldwide
- It's widely used as fundamental technology supporting our daily lives in Android, web servers, cloud, and more
- It's an essential skill in the IT industry, so let's learn step by step starting from basic commands