Linux Inside: The Ideal Blog for Sysadmins & Geeks

🚀 Pro TecMint now has 16 Linux courses live! 🟢 Beginner: Learn Linux in 7 Days → pro.tecmint.com/learn-linux/ 100+ Essential Linux Commands → pro.tecmint.com/linux-commands… 11 Best Linux Distributions → pro.tecmint.com/best-linux-dis… Linux Interview Handbook → pro.tecmint.com/linux-intervie… SSH Complete Course → pro.tecmint.com/ssh-complete-c… 🔵 Advanced: AI for Linux → pro.tecmint.com/ai-for-linux/ Bash Scripting → pro.tecmint.com/learn-bash-scr… Ubuntu Handbook → pro.tecmint.com/ubuntu-handboo… Linux Performance Monitoring → pro.tecmint.com/linux-monitori… Golang for DevOps → pro.tecmint.com/learn-go/ Claude for Linux → pro.tecmint.com/claude-code-fo… 🏆 Certifications: RHCSA → pro.tecmint.com/rhcsa-certific… RHCE → pro.tecmint.com/rhce-certifica… LFCS → pro.tecmint.com/lfcs-certifica… LFCA → pro.tecmint.com/lfca-certifica… All courses included in the Root plan at $8/month or $59/year. Lifetime access at $199 one-time. 👉 pro.tecmint.com #Linux #SysAdmin #DevOps

Quick Linux tip: ss with state filters is far more powerful than netstat for diagnosing connection issues on production servers. $ ss -tnp state established '( dport = :443 or sport = :443 )' Shows only active HTTPS connections with the process name attached. Useful when tracking connection leaks or unexpected traffic spikes. Follow @tecmint for more #Linux tips...

Follow @tecmint to improve your Linux skills with articles, courses, ebooks, and CLI tips.

Tired of Go tutorials that teach syntax but leave you clueless when it's time to build real tools? I wrote a book where you build 7 DevOps projects: GitHub tools, task manager, HTTP server, system monitor, and more. The goal is simple: learn Go by building real things. tecmint.gumroad.com/l/golang-devops #golang #devops #linux

I'm building the most complete #LFCA certification course on the internet. It includes 28 chapters that take you from Linux fundamentals to cloud computing, security, DevOps, and IT project management. Right now, 5 chapters are live: Chapter 1: pro.tecmint.com/understanding-… Chapter 2: pro.tecmint.com/linux-file-man… Chapter 3: pro.tecmint.com/basic-linux-sy… Chapter 4: pro.tecmint.com/linux-networki… Chapter 5: pro.tecmint.com/managing-linux… Start learning here → pro.tecmint.com/managing-linux… Follow @tecmint for new chapters every week.

Most sysadmins give SSH access just for file uploads and end up worrying about what users do on the server. You can avoid that by giving SFTP-only access to a single directory without shell, no commands, no browsing. 🔐 SSH tip: SFTP chroot jail setup Add this to sshd_config: Match User sftpuser ChrootDirectory /var/sftp/sftpuser ForceCommand internal-sftp PasswordAuthentication yes AllowTcpForwarding no X11Forwarding no Now the user can only upload/download files inside their folder. Want a full multi-user setup, groups, and troubleshooting for common chroot errors? Read here: pro.tecmint.com/setting-up-a-c… Follow @tecmint for more #Linux and #SSH tips.

MySQL is running slow, and you don't know why. These 6 CLI tools show you exactly what's happening - slow queries, thread spikes, buffer pool issues, all from the terminal. 👉 tecmint.com/mysql-performa… Follow @tecmint for more #Linux and #SysAdmin tips.

New chapter live on Pro TecMint: How to Use Claude Code to Read and Review Linux Config Files This chapter is for every sysadmin who has ever inherited a server and had no idea what half the config files actually do. It’s Chapter 5 of a 32-chapter course built for professionals who live in the terminal. Read the full chapter here: pro.tecmint.com/read-linux-con… Follow @tecmint for a new chapter every week. #Linux #ClaudeCode #SysAdmin

Running out of disk space, but can’t find the files? You’re likely dealing with hidden usage from deleted files still open by running processes. That’s why df and du don’t match. How to find it: tecmint.com/df-du-disk-usa… Follow @tecmint for more #Linux and #SysAdmin tips.

Just published: Project 2: Build a CLI GitHub First Commit Finder in Go If you're a DevOps engineer or system administrator learning Golang, this tutorial covers: - Working with GitHub API pagination using the Link header - Parsing and validating command-line arguments in owner/repo format - Using regular expressions in Go to extract URLs from headers - Decoding nested JSON responses with structs - Making sequential API calls based on previous responses - Includes complete code examples and step-by-step explanations. Part 2 of our 7-project #Golang series is designed specifically for #DevOps professionals. Read the full guide (Pro members only): pro.tecmint.com/github-first-c… Follow @tecmint to stay updated with this series!

I’m building the most complete #SSH course on the internet. It includes 54 chapters that take you from beginner to enterprise-level SSH administration. Right now, 25 chapters are live, covering everything from your first SSH connection to security hardening, key management, file transfers, and SSHFS. Start learning here → pro.tecmint.com/ssh-complete-c… Follow @tecmint for new chapters every week.

[Updated] How to Check Linux OS Name and Kernel Version [6 Quick Methods] tecmint.com/check-linux-os… Follow @tecmint for more #Linux tips.

New chapter live on Pro TecMint: Claude Code Sessions, Context, and the Permission Model for Linux Sysadmins This is the chapter that makes the rest of the course click. Most sysadmins install Claude Code, run it once, and then wonder why it asks for permission on some commands but not others, or why it "forgot" a file it saw ten minutes ago. This is a 32-chapter course built for professionals who work in the terminal every day. Read the full chapter here: pro.tecmint.com/how-claude-cod… Follow @tecmint for a new chapter every week. #Linux #ClaudeCode #SysAdmin

Most sysadmins run SCP to back up a server directory, get interrupted halfway through, and start the whole thing over. There is a better way, and it has been in every Linux distro for decades. 🔐 SSH tip of the day: Use rsync instead of SCP for anything larger than a single file: bashrsync -avz --delete \ ravi@192.168.1.100:/var/www/html/ \ ~/backups/website/ Want the full setup, exclude patterns, a production-ready backup script, and a clear comparison of when to use rsync versus SCP versus SFTP? This is Chapter 24 of our 54-chapter SSH course, created for beginners and goes all the way to enterprise-level SSH mastery. Read it → pro.tecmint.com/incremental-fi… Follow @tecmint for a new SSH chapter every week.

🚀 New chapter live on Pro TecMint: Chapter 3: Basic Linux System Administration Commands If you're new to Linux and don't know where to start, this LFCA Certification Course is for you, covering 6 domains across 28+ chapters. Check it out → pro.tecmint.com/basic-linux-sy… Follow @tecmint to stay updated as we publish new chapters weekly.

Copying a 50GB file and have no idea when it'll finish? Linux has better tools for large files and million-file directories than most sysadmins use daily. Real examples inside: tecmint.com/copy-large-fil… Follow @tecmint for more #Linux and #SysAdmin tips.

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/opencode-… Follow @tecmint for more Linux guides. #Linux #AI #Terminal #OpenSource

Updated: How to Generate and Verify MD5 Checksums in Linux [2026] New sections added: - Generate checksums with md5sum - Verify file integrity - Practical examples - SHA-256 comparison 👉 tecmint.com/generate-verif… Follow @tecmint for more #Linux tips.

We just published a complete guide to installing #Fedora CoreOS on a bare metal server, which is one of the most powerful immutable #Linux distributions for running containers at scale. Topics covered: - Butane & Ignition configuration - Bare metal install with coreos-installer - SSH key provisioning - Running containers with #Podman - Auto-start services with systemd Quadlets Perfect for #DevOps engineers and sysadmins building container-ready Linux infrastructure. pro.tecmint.com/blog/install-f… Follow @tecmint for more #Linux tips.

None of the Linux distributions on this list has implemented age verification as of this writing, despite ongoing legislative pressure in the US and Brazil.

A lot of Linux users still think Ubuntu is the most popular Linux distro, but the 2026 DistroWatch rankings say otherwise. Ubuntu sits at #10. The #1 spot will genuinely surprise you: tecmint.com/top-most-popul… Follow @tecmint for more #Linux and #SysAdmin tips.