Recap and FAQ
Summary: this last lesson condenses the previous 5 into one picture, answers the 12 questions beginners ask most (useful both to lift the last doubts and for Google indexing), and points you to the next step.
1. What you know now
You are not a Linux user yet. But you now have the mental foundation to learn the commands quickly and without confusion. It is the difference between understanding traffic rules and knowing how to drive — you are ready for step two.
2. FAQ · beginners' frequent questions
2.1 Is Linux hard?
The concepts are accessible (you just saw five that are enough to understand 90% of the usage). What takes time is memorizing the commands and building terminal reflexes.
Count on 2 to 4 weeks to be comfortable in everyday use if you practise daily. 3 to 6 months to never be afraid of anything again.
2.2 Do I need to uninstall Windows or macOS?
No. Three options coexist perfectly:
- Virtual machine with VirtualBox or VMware — Linux runs in a window, your main system stays intact.
- WSL (Windows Subsystem for Linux) — native Linux built into Windows 10/11, no reboot.
- Dual boot — choose Linux or Windows at startup. More involved, but maximum performance.
Our Premium Linux 1 to 5 path starts by setting up these test environments.
2.3 Does Linux get viruses?
Very few, but it is not magic. Three reasons explain the low exposure to consumer viruses:
- Strict permission model: by default, a downloaded program cannot modify the system without the administrator password.
- Centralized software ecosystem: software is installed through an official package manager (
apt,dnf), not by clicking on random.exefiles. - Distribution diversity: a virus targeting Ubuntu will not necessarily work on Fedora or Alpine.
Beware nonetheless: Linux servers are massively targeted by automated attacks (SSH, web exploits, crypto miners). A poorly configured Linux server is as vulnerable as a Windows one. The difference is that the tools to configure it properly are native and free.
2.4 Do I need to know the terminal?
Yes, absolutely. Linux with only the graphical interface is like driving a car using only first gear. You deprive yourself of 90% of the power.
The good news: the terminal is easy to learn. 20 commands cover 90% of daily usage. They are covered in detail in Premium Linux 1.
2.5 Which distribution to start with?
Ubuntu Desktop LTS, without hesitation. Three reasons:
- Friendly interface, installed in 15 minutes.
- Huge community — the solution to your problem is already on Google.
- De facto standard on cloud servers: what you learn on your machine applies to an AWS server.
See lesson 3 for the full comparison.
2.6 Will Linux run on my old PC?
Very probably, yes. Linux consumes far less than modern Windows. A 2015 machine with 4 GB of RAM runs perfectly on Ubuntu or, even better, on a light distribution like Xubuntu, Linux Mint or Lubuntu.
It is the classic second life of an old computer: put Linux back on it, use it as a secondary machine or a home server.
2.7 Do Windows programs work on Linux?
Directly, no. An .exe designed for Windows does not run natively on Linux.
But:
- Alternatives are legion and often excellent (LibreOffice instead of Office, GIMP instead of Photoshop, Krita, Blender, DaVinci Resolve…).
- Wine and Proton (used by Steam) can run many Windows programs on Linux, including most recent video games.
- Valve's Steam Deck runs on Linux, and plays Cyberpunk 2077 and the like without a hitch.
2.8 Is Linux really free?
Yes. No cost for installation, use or redistribution. You can put it on 1 or on 10,000 machines, the bill is 0 dollars.
The companies living off Linux (Red Hat, Canonical, SUSE) sell commercial support, not the software. That inverted model works: Red Hat was bought by IBM for 34 billion dollars in 2019.
2.9 Can I install Linux on a Mac?
Yes, including on recent Macs with Apple Silicon processors (M1, M2, M3) thanks to the Asahi Linux project. On older Intel Macs, all the classic distributions work.
Simpler alternative: use Docker Desktop on macOS, which runs Linux in a light virtual machine, invisibly, in the background.
2.10 How long until I am productive on Linux?
Honest estimate based on our learners' experience:
| Step | Typical duration |
|---|---|
| Understanding the concepts (this discovery course) | 30 minutes |
| Navigating the terminal with the 20 basic commands | 10 to 20 hours of practice |
| Writing your first useful Bash scripts | 30 to 50 hours |
| Administering a production server | 200 to 500 hours of real experience |
| Becoming a recognized expert | several years |
2.11 Can I make a living from Linux professionally?
Very much so, yes. Jobs that require Linux (at least as a prerequisite):
- System administrator or DevOps engineer — Linux is the foundation.
- SRE (Site Reliability Engineer) — 100% of the time on Linux.
- Cloud engineer — cloud machines are mostly Linux.
- Offensive or defensive security engineer — tools and servers = Linux.
- Data engineer — big data pipelines almost exclusively on Linux.
- Backend developer — production runs on Linux, you must know how to debug on it.
A seasoned DevOps profile mastering Linux negotiates very well on the job market.
2.12 Is Linux the future, or a passing fad?
Certainly not a fad. Thirty-five years after its creation, Linux has become infrastructurally irreplaceable: the cloud, containers, AI (GPU servers run Linux), embedded, automotive — everything rests on it.
The question today is no longer "will Linux last?" but "what could possibly replace it, given that it already does everything?". And the honest answer is nothing on the horizon of the next ten years.
3. Going further
Three possible directions.
Direction 1 · Learn to use Linux (recommended)
It is the logical continuation of this course. The Premium Linux 1 to 5 path covers:
- Linux 1 — Installation, terminal navigation, essential commands.
- Linux 2 — Users, groups, permissions, sudo, package management.
- Linux 3 — Network, SSH, firewall, scheduled tasks, archiving.
- Linux 4 — Bash scripting: variables, conditions, loops, functions, DevOps projects.
- Linux 5 — Advanced administration: security, logs, high availability, virtualization.
The complete path represents 60 to 80 hours of structured content, with exercises and projects.
Direction 2 · Explore the other DevOps foundations
This discovery course has a cousin for every building block of modern DevOps:
- Discovery: Git — understanding version control.
- Discovery: Docker — containers.
- Discovery: Kubernetes — orchestrating containers.
- Discovery: CI/CD — automating tests and deployments.
- Discovery: Cloud — AWS, GCP, Azure demystified.
Direction 3 · Jump straight to practice
Install Ubuntu in a virtual machine with VirtualBox. Count 30 minutes, it is free. Open a terminal, type ls, cd, pwd, whoami. You are already in Linux.
4. One last picture to take with you
Remember in 30 seconds
- This course gave you the mental foundation. The commands will come quickly with practice.
- Recommended next step: the Premium Linux 1 path to move to practice.
- Another discovery course (Git, Docker…) to broaden your culture.
Congratulations, you have finished the Linux discovery course.
Ready for practice? Discover Premium Linux 1 →
Want to explore the other foundations? See all discovery courses →
Last step: take the end-of-course quiz — five corrected and explained questions, three minutes, to check that the essentials are in place.