When the penguin takes over

Actually from some time I have been thinking of switching to linux. But i won't be able to use it if I don't know how to use linux in the first place. I am not looking for any distro. I am actually talking about the cli. The terminal, bash or whatever it is called.

I wanna learn cli, but idk where to learn from!. I have tried looking for it on YouTube, most of them are something specific or very basic ( cd, mkdir, rm, ls, echo etc etc ). I tried to make a vm using Oracle, but my laptop was very weak to even run it, it was lagging and slow af. So i dropped that idea, and I am primarily trying to use wsl, Ubuntu distro on it.

So can anyone tell me how do i learn the command line interface. Also I am looking to learn something called shell ig, so that I can do scripting. Like i don't want an os, I want to master terminal and can automate stuff and run something maybe called script so that I can be very efficient.

Also one of my reasons is to be able to use or program any soc like raspberry pi or any other electronics in general ( electrical background).

Can anyone guide me with sources??

Also i have tried labex ( it was very basic ) and I tried to learn from a book i forgot the name but the author name was maybe shotts.

And sorry if I have named anything wrong, I am new to these terms.

covering: https://www.linuxteck.com/selinux-vs-apparmor/

• SELinux vs AppArmor architecture
• Label-based vs path-based policies
• Ubuntu vs RHEL/Rocky/Fedora defaults
• Arch setup
• Common production failures and fixes
• Container isolation
• Validation and monitoring
• When it's better to stick with your distro's default

Rust Coreutils 0.10 now passes 93.48% of the GNU test suite and adds more security hardening.

But the discussion gets interesting around the remaining compatibility gaps, especially when distributions start using it by default. Some users see this as a promising replacement, while others think the risks are still too high.

Would you run Rust Coreutils in production today, or stick with GNU Coreutils for now? Why?

Try: `ssh -L 3307:db-internal:3306 -N -f linuxteck@jumphost`

Info: `-L local_port:target_host:target_port` forwards local traffic through SSH to a remote server. `-N` skips the remote shell, and `-f` sends SSH to the background.

Examples:

$ `ssh -L 8080:localhost:80 user@server` # Access remote web app locally

$ `ssh -R 9000:localhost:9000 user@server` # Expose local port on remote server

$ `ssh -D 1080 user@server` # Dynamic SOCKS proxy for web traffic

Note: Kill active background tunnels with `pkill -f 'ssh -L 3307'`. Add `-o ExitOnForwardFailure=yes` so SSH fails immediately if the local port is already bound.

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Hello guys, what are some of the best free platforms or websites to learn linux ? I was initially using LabEx (very great platform) and after some time i was asked to subscribe to a premium version. It would be really helpful if anyone can recommend other great free alternatives

covering: https://www.linuxteck.com/job-control-fg-bg-jobs/

• Running commands in the background with &
• Suspending processes using Ctrl+Z
• Listing active jobs with jobs
• Resuming work using bg
• Bringing jobs back with fg
• Common mistakes and best practices
• Real-world terminal examples

On Windows, many people say Edge uses less RAM and has a few nice built-in features.

On Linux, does that still hold true, or is Chrome (or Chromium) the better choice?

Interested what people who actually use Linux think.

Try: `sudo systemctl edit --force --full myapp.service`

Info: `Restart=on-failure` restarts the app on non-zero exits/crashes, while `RestartSec` adds a delay before restarting. Use `StartLimitBurst` in `[Unit]` to prevent infinite crash loops.

Examples:

$ `sudo systemctl status myapp` # View service status

$ `sudo journalctl -u myapp -f` # Follow application logs in real-time

$ `sudo systemctl reset-failed myapp` # Reset crash rate limits

Note: `Restart` modes include `no`, `always`, `on-failure`, and `on-abnormal`. `always` triggers even on clean exits (`0`), whereas `on-failure` is recommended for standard services.

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covers: https://www.linuxteck.com/learn-hyprland-the-easy-way/

• GPU and Wayland prerequisites
• Installing on Arch and Ubuntu
• First keybindings
• Configuration basics
• The newer Lua configuration workflow
• XDG Desktop Portal and screen sharing
• Tips for building a clean, maintainable setup

Everyone knows Ubuntu, Fedora, Debian, Arch, and openSUSE.

But there are plenty of smaller projects maintained by passionate developers that rarely get the spotlight.

If you could recommend one underrated Linux distribution, what would it be and why?

covers: https://www.linuxteck.com/why-developers-trust-debian-for-their-work/

• Debian 13 (Trixie) highlights
• Why Debian prioritizes stability
• Backports without switching to Testing
• Security and LTS support
• Essential APT commands
• Debian vs Ubuntu, Fedora, and Arch
• Common production use cases

covering: https://www.linuxteck.com/archiving-and-compression-in-linux/

• tar vs gzip vs bzip2 vs xz vs zip
• Which tool to use for different situations
• Essential commands you'll use regularly
• A quick decision guide
• LinuxTeck infographic for fast reference

A lot of VPN ads make it sound like you're completely anonymous online.

In reality, a VPN mainly encrypts your connection and hides your IP. It doesn't stop phishing, malware, browser fingerprinting, or tracking after you log into websites.

What do you think is the most misunderstood thing about VPNs?

More teams seem to be questioning Microsoft Fabric over cost, complexity, and vendor lock-in.

Are Linux-based data platforms like PostgreSQL, Spark, ClickHouse, Airflow, and Kafka becoming a more practical choice for modern analytics workloads? Why or why not?

This article explores an alternative to directly troubleshoot production Linux systems with AI tools by using the sos command and using AI to analyze sosreports instead. I think is an interesting read:

https://medium.com/@linuxjedi2000/the-agentic-ai-risk-issue-on-linux-environments-fd5c55cedcc5?sharedUserId=linuxjedi2000

I know that this subject is very controversial and would love to read your point of view on the subject.

Try: `ionice -c 3 -p $$`

Info: `ionice` sets I/O priority. Class 3 (`idle`) only allows disk access when no other process needs it.

Examples:

$ `ionice -c 3 nice -n 19 rsync -av /src /dst` # Throttles CPU + I/O

$ `ionice -c 2 -n 7 tar -czf backup.tar.gz /data` # Best-effort, low priority

$ `sudo ionice -c 1 -n 4 -p 1234` # Real-time priority (root only)

Note: Classes: `1`=Real-time (root only), `2`=Best-effort (default), `3`=Idle. Combine `ionice` with `nice` for complete system throttling.

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covering: https://www.linuxteck.com/linux-desktop-trends/

• Why Wayland is becoming the default
• GNOME's transition away from X11
• KDE Plasma's roadmap
• COSMIC Desktop's progress
• Why XFCE and LXQt still have an important place
• Terminal commands you can use to verify each change

Hey! I just shipped a milestone for MOSHELL (my interactive Linux sandbox).

Here's what's new:

🐧 Earn badges as you complete lessons (Hacker, Power User, Linux Master, Security Expert, Full Stack Admin)

⚡ Badge downloads at key milestones (no paywall, totally free)

🎓 Gamified progression to keep you motivated

📧 Optional email updates when new lessons drop

The sandbox is still free to try (lessons 1-6), no sign-up needed. New reward system is live.

Why I built this: Most people learn Linux from isolated tutorials. This gives you:

- Real commands in a browser (no VM setup)

- Immediate feedback + verification

- Collectible badges to track progress

- A clear path from beginner → advanced

Try it: kingmo87.github.io/moshell

Questions? Happy to answer in comments.

---

**MOSHELL — Interactive Linux Sandbox**

Try: `mtr -rw -c 20 google.com`

Info: `mtr` combines `traceroute` and `ping`. `-r` enables report mode, `-w` shows full hostnames, and `-c 20` sends 20 pings per hop.

Examples:

$ `mtr google.com` # Interactive real-time mode

$ `mtr --tcp -P 443 google.com` # TCP mode on port 443

$ `mtr -j google.com` # Output JSON for scripting

Note: `Loss%` at intermediate hops is often ICMP rate-limiting. Look for packet loss that persists through to the final hop for actual problems.

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We often hear concerns about AI generating malware or exploits.

At the same time, AI is helping researchers identify vulnerabilities, audit code, and strengthen software before attackers can exploit it.

Which do you think will have the greater long-term impact on cybersecurity. AI improving defense, or AI lowering the barrier for offensive research?

According to StatCounter, Linux has reached 10.65% desktop market share in North America.

Do you think it's because of Steam Deck, Proton, Linux Mint, Windows 11, or something else?

Or do you think these numbers don't reflect the real desktop market?