Linux Tutorials
Master Linux administration, shell scripting, and system management. Essential skills for every DevOps and SRE professional.
The Complete Linux Learning Roadmap — From Zero to SRE
A step-by-step roadmap to go from Linux beginner to production-ready SRE, with structured learning paths and resources.
Read article →Top 50 Linux Interview Questions for DevOps & SRE Roles
The actual questions asked at Amazon, Google, and top startups — organized by difficulty with concise answers.
Read article →Linux High Availability — Keepalived, HAProxy, and Clustering
Eliminate single points of failure with VRRP, load balancing, health checks, and failover testing.
Read article →Automate Linux Server Management with Ansible
Managing 50 servers manually? Configure all of them in one command with Ansible playbooks and roles.
Read article →Linux Backup & Disaster Recovery — rsync, tar, and Automation
It's not a matter of IF your disk fails — it's WHEN. Set up automated, tested backups.
Read article →Monitor Linux Servers with Prometheus and Grafana
Set up monitoring in 15 minutes — node_exporter, Prometheus, Grafana dashboards, and alerting rules.
Read article →SELinux vs AppArmor — Mandatory Access Control Explained
That mysterious Permission denied when everything looks correct — SELinux is probably why.
Read article →Advanced Linux Networking — VLANs, Bridges, and Network Namespaces
Kubernetes networking makes no sense until you understand these Linux primitives.
Read article →ext4 vs XFS vs Btrfs — Choosing the Right Linux Filesystem
You're about to format a 10TB disk — which filesystem should you choose? Benchmarks and comparison.
Read article →Linux Troubleshooting Like a Pro — strace, lsof, tcpdump
The app works on staging but fails on production — here's the systematic way to find out why.
Read article →Linux Server Hardening Checklist — 20 Steps to Secure Your Server
You just deployed a server on the internet — here are the 20 things you must do before going to sleep.
Read article →How Containers Actually Work — Namespaces, Cgroups, and chroot
Docker isn't magic — here's how to build a container with just Linux commands.
Read article →Linux Kernel Parameters (sysctl) Every SRE Should Tune
Default kernel settings are for laptops — here's how to tune for production servers.
Read article →Linux Performance Tuning — CPU, Memory, and I/O Optimization
Your server handles 1000 requests/sec — here's how to push it to 10,000.
Read article →sed, awk, grep — The Holy Trinity of Linux Text Processing
Parse a 10GB log file in seconds — no Python needed. Master the three essential text processing tools.
Read article →Shell Scripting Series Part 3 — Error Handling, Logging, and Production Scripts
Your scripts work on your machine — here's how to make them production-ready.
Read article →Shell Scripting Series Part 2 — Real-World Automation Scripts
6 scripts you can use in production today — copy, customize, deploy.
Read article →Shell Scripting Series Part 1 — Variables, Loops, and Functions
You're doing the same 15 commands every deployment — let's turn that into one script.
Read article →Linux Firewalls — iptables, nftables, and UFW Explained
Your server is exposed to the internet with zero firewall rules — let's fix that in 10 minutes.
Read article →Linux Log Analysis — Find Problems Before They Find You
The server was acting weird for 3 days before it crashed — the logs told the story all along.
Read article →Systemd Deep Dive — Services, Timers, and Boot Targets
Your app crashes at 3 AM and nobody restarts it — systemd can fix that forever.
Read article →Linux Disk & Storage Management — From fdisk to LVM
Server says disk full but you see 50% free — here's what's actually happening.
Read article →SSH Mastery — Keys, Tunnels, Config and Security
Still typing passwords? Here's how to SSH like a pro with keys, tunnels, and jump hosts.
Read article →Automate Anything with Linux Cron Jobs — A Practical Guide
Stop doing repetitive tasks manually — automate backups, log rotation, and health checks.
Read article →Linux Networking Commands Every Engineer Should Know
Your app can't connect to the database — here's how to debug it step by step.
Read article →Linux Users & Groups — The Complete Access Control Guide
A new developer joins your team — here's how to set up their Linux access properly.
Read article →apt vs yum vs dnf — Linux Package Managers Demystified
Which one should you use? Here's the real difference between Linux package managers.
Read article →Linux Process Management — ps, top, kill and Beyond
That runaway process eating 100% CPU at 3 AM — here's how to find and fix it.
Read article →Linux File Permissions Explained — Who Can Do What?
Your deployment script fails with Permission denied — here's why and how to fix it.
Read article →Linux Essentials for DevOps Engineers
Master essential Linux commands and concepts every DevOps engineer needs. From file management to shell scripting.
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