systemctl: Find and Fix Broken Services in Linux Learn how to use systemctl with the --failed flag to instantly spot broken services on your Linux system, without scrolling through hundreds of healthy ones.

Most sysadmins scroll through systemctl status for 5 minutes to find one broken service.

systemctl list-units --failed answers the same question in two lines.

New guide with 5 real examples

www.tecmint.com/how-to-find-...

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9. Getting Started with openSUSE Leap In this chapter, you'll learn what makes openSUSE stand apart from everything else in this course, how to install it using the brand-new Agama installer, and how to use Zypper and Snapper.

Just published 9 chapters of my new course "11 Best Linux Distributions You Should Try".

2 more coming...

All chapters are free to read at pro.tecmint.com/install-open...

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Chapter 20: Use SSH Agent to Add Keys, Protect Passphrases, and Persist Sessions In chapter 20, you'll learn what the SSH agent is, how to start it, add keys, manage passphrases, and keep it running across terminal sessions.

Most people protect their SSH key with a passphrase and then remove it a week later because typing it every time is too annoying.

Chapter 20 of our SSH course covers it end-to-end.
Read it → pro.tecmint.com/ssh-agent-li...

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How to Install Claude Desktop on Linux In this guide, we'll explain what claude-desktop-debian is, how to build the native package, and how to connect MCP servers on Linux.

How to Install Claude Desktop on Linux Without Wine

In this guide, we’ll explain what claude-desktop-debian is, how to build the native package without wine, and how to connect MCP servers on Linux.

www.tecmint.com/install-clau...

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Chapter 14: SSH Host Aliases and Shortcuts In this chapter 14, you will learn how to create descriptive host aliases, use wildcard patterns for groups of servers, set per-host defaults, and organize your SSH config for multiple environments.

Chapter 14 is live - SSH Host Aliases, Shortcuts, and Per-Host Defaults

Read the full guide (Pro members only):
→ pro.tecmint.com/ssh-config-a...

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This is Chapter 13 of our 54-chapter SSH course, built for beginners and goes all the way to enterprise-level SSH mastery.

Read the full guide (Pro members only):
→ pro.tecmint.com/ssh-config-f...

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OpenCode lets you use Claude, GPT, Gemini, DeepSeek, or any local model directly from your Linux terminal.

New guide on Pro TecMint
→ pro.tecmint.com/blog/opencod...

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#Linux #AI #Terminal #OpenSource

Chapter 12 is live - Installing Your Public Key on Servers and Testing Login

This is Chapter 12 of our 54-chapter SSH course, built for beginners and goes all the way to enterprise-level SSH mastery.

Read the full guide (Pro members only):
→ pro.tecmint.com/install-ssh-...

It's out. After months of writing, the Ubuntu Handbook course is finally here.

23 chapters covering everything from the basics to advanced system administration - storage, networking, database management, Bash scripting, system monitoring, and more.

👉 pro.tecmint.com/ubuntu-handb...

mergerfs: The Home Lab Storage Pool Every Linux User Needs Learn how to merge multiple hard drives into a single, easy-to-manage home media storage pool on Linux using mergerfs.

The Linux Home Lab Storage Series is complete

Part 1: mergerfs: Combine all drives into one pool
→ pro.tecmint.com/blog/mergerf...

Part 2: SnapRAID: Protect your pool with parity
→ pro.tecmint.com/blog/snaprai...

Part 3: smartmontools: Monitor drive health 24/7
→ pro.tecmint.com/blog/smartmo...

Chapter 11: Generating SSH Key Pairs with ssh-keygen In Chapter 11, you will learn how to generate your first SSH key pair using the ssh-keygen command, understand where SSH stores your keys, set a passphrase to protect your private key, and verify your...

Chapter 11 is live - Generating SSH Key Pairs with ssh-keygen

Read the full guide (Pro members only):
→ pro.tecmint.com/generate-ssh...

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Chapter 9: Introduction to SSH Public Key Cryptography In Chapter 9, you'll learn what public key cryptography actually is, how the two-key system works, and why your private key never needs to leave your machine to prove your identity to a server.

Chapters 9 & 10 are live - Public Key Cryptography and SSH Key Types

This is part of our 54-chapter SSH course, built for beginners and goes all the way to enterprise-level SSH mastery.

Read the full guides (Pro members only):

→ pro.tecmint.com/ssh-public-k...
→ pro.tecmint.com/ssh-key-types/

SnapRAID: Protect Home Lab Storage from Drive Failure Learn how to protect your mergerfs storage pool from drive failure using SnapRAID with parity, automated sync, and full drive recovery.

SnapRAID protects your mergerfs storage pool by calculating parity across all your data drives

New guide on Pro TecMint 👇
pro.tecmint.com/blog/snaprai...

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#Linux #HomeLab #SelfHosted #SnapRAID

Chapter 8: How SSH Password Authentication Works In Chapter 8, you'll learn how password authentication works under the hood, why it's a serious security risk for any public-facing server, and the safe sequence to follow before disabling it entirely...

This is Chapter 8 of our 54-chapter SSH course, built for beginners and goes all the way to enterprise-level SSH mastery.

Read the full guide (Pro members only):
→ pro.tecmint.com/ssh-password...

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mergerfs: The Home Lab Storage Pool Every Linux User Needs Learn how to merge multiple hard drives into a single, easy-to-manage home media storage pool on Linux using mergerfs.

MergerFS combines all your hard drives into a single smart storage pool.

New guide on Pro TecMint 👇
pro.tecmint.com/blog/mergerf...

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#Linux #HomeLab #SelfHosted #Plex

Chapter 7: Troubleshooting Common SSH Connection Errors In Chapter 7, you’ll learn how to diagnose and fix common SSH connection errors like connection refused, permission denied, host key issues, and timeouts.

Chapter 7 is live - Troubleshooting Common SSH Connection Errors

This is Chapter 7 of our 54-chapter SSH course, built for beginners and goes all the way to enterprise-level SSH mastery.

Read the full guide (Pro members only):
→ pro.tecmint.com/troubleshoot...

Chapter 4: Installing SSH on Linux and macOS In this Chapter 4, learn how to install and configure SSH on Linux and macOS, and get your SSH client and server ready for secure remote connections.

Chapter 4 is live - Installing SSH on Linux and macOS

This is Chapter 4 of our 54-chapter SSH course, built for beginners and goes all the way to enterprise-level SSH mastery.

Read the full guide (Pro members only):
→ pro.tecmint.com/installing-s...

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df Command in Linux: Disk Space, Inodes & Real Fixes Master the df command in Linux with 15 real-world examples that include inode checks, filesystem filtering, disk alerts, and fixing "no space left" errors.

Stop guessing why your Linux server says "No space left on device" when df -h shows free space!

www.tecmint.com/df-command-l...

Article updated with inode exhaustion diagnosis, LVM + tmpfs filtering, real-world cron alerting scripts

If you're learning #Linux, this is your roadmap.

✔ Distros
✔ Package managers
✔ Containers
✔ Security
✔ DevOps

All in one place.
Save this before you forget.

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🖥️ Linux SysAdmin Interview Question:

Your SSH session disconnected mid-deploy. The deployment is still finished. Successfully.

How? 👇 Drop your answer in the comments!

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Project 7: Building a Currency Converter Tool in Go Build a currency converter CLI tool in Go using exchange rate APIs while learning API authentication, floating-point calculations, and practical financial application development.

Project 7 is live - Build a Command-Line Currency Converter with Go

This is the final project of our 10-lesson Go Programming Series, built for DevOps engineers and sysadmins who want to write real tools from day one.

Read the full guide (Pro members only):

→ pro.tecmint.com/build-curren...

How to Run fsck to Repair Linux Disk and Filesystem Errors Learn how to use the fsck command in Linux to check and repair filesystem errors on ext4, LVM, and RAID volumes with practical examples.

The fsck command is all you need to check errors, auto-repair partitions, run it on root, LVM, and RAID volumes, plus know exactly what those exit codes mean.

🔗 www.tecmint.com/fsck-repair-...

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Project 4: Build a Markdown to HTML Converter Learn how to build a Markdown to HTML converter in Go using the goldmark package. Covers io.Reader, bytes.Buffer, stdin piping, and file redirection.

Project 4 is live - Build a Markdown to HTML Converter in Go

Read the full guide (Pro members only):

→ pro.tecmint.com/build-markdo...

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Follow @tecmint.bsky.social for more such #Linux tips...

How to Create HTTPS Local Domains for Development on Linux Learn how to create trusted HTTPS .local domains for your local projects on Linux using slim - no browser warnings, no manual certificate setup.

Tired of "Your connection is not private" on localhost? Set up a trusted HTTPS .local domain for any local project in seconds.

👉 www.tecmint.com/setup-https-...

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Companies save 25-40% by switching to Linux.

#Linux isn't just free. It makes you MONEY 💵

RT to help your IT budget

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33 Must-Have Linux Performance Monitoring Tools A complete list of 33 best command-line tools to monitor Linux performance - covering CPU, memory, disk I/O, network, and security with examples and pro tips.

33 Best Command Line Tools to Monitor Linux Performance

Each tool includes install commands, practical examples, and a pro tip.

🔒 Full guide (free members only):

pro.tecmint.com/blog/linux-p...

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How to Use RAR and Unrar Commands in Linux (With Examples) This guide will help you install the unrar and rar command-line tools to open, extract, and create archive files on Linux.

[Updated] How to Create, Extract, and List RAR Files in Linux

www.tecmint.com/how-to-open-...

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Chapter 3: Understanding SSH-1, SSH-2, and Use Cases Learn how SSH-1 and SSH-2 differ and how SSH is used for remote administration, file transfers, and CI/CD pipelines.

Chapter 3 is live - Understanding SSH-1, SSH-2, and Use Cases

Read the full guide (Pro members only):
→ pro.tecmint.com/ssh-1-vs-ssh...

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Project 3: Build a Command-Line Task Manager in Go Learn how to build a persistent CLI to-do manager in Go that reads, writes, and manages tasks stored in a JSON file using structs, file I/O, and switch statements.

Project 3 is live - Build a Command-Line Task Manager in Go

Read the full guide (Pro members only):

→ pro.tecmint.com/build-a-comm...

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