Linux for Developers: The Commands You’ll Use Daily
A practical starter set for navigating, searching, and fixing issues.
System Administration & Networking posts
Posts in System Administration & Networking.
SSH Like a Pro: Keys, Agents, and Safer Defaults
Stop password logins and make remote work painless.
systemd Demystified: Services, Timers, and Logs
Run apps reliably on Linux without magic scripts.
Linux Logs 101: journalctl, logrotate, and Troubleshooting
Find the error fast and keep disks from filling up.
Backups That Work: 3-2-1, Snapshots, and Restore Tests
The backup plan most people think they have (but don’t).
DNS Explained: Records, Caching, and ‘It Works for Me’ Bugs
Understand why DNS issues feel haunted and how to fix them.
TLS Basics: Certificates, Chains, and Common Misconfigurations
Make HTTPS reliable and stop scary browser warnings.
Firewalls for Humans: UFW, iptables, and What to Block
Protect servers without accidentally locking yourself out.
Nginx Reverse Proxy: A Clean Setup for Multiple Apps
Host many services on one server with sane configs.
Monitoring Basics: Uptime, Resources, and Alerting That Isn’t Spam
Catch issues early with a minimalist monitoring setup.
Wireshark for Beginners: Find the Problem Packet
A practical guide to filtering and diagnosing traffic.
Network Latency Troubleshooting: Ping, Traceroute, MTR
Pinpoint where slowness starts and what to do next.
VPNs Explained: WireGuard vs OpenVPN (And When to Use Which)
Secure remote access with modern defaults.
Disk Space Mysteries: Finding What’s Eating Your Server
Identify large files, logs, and runaway containers safely.
Ansible Starter Kit: Automate Server Setup Repeatably
From one server to many without copy-paste configs.
VLANs at Home: Segment Your Lab Without Enterprise Headaches
Safer networks for IoT, guests, and servers.
Run Containers on a Server: Docker Compose the Right Way
Reliable restarts, updates, logs, and backups for self-hosting.
The 10-Minute Server Security Baseline Checklist
Quick wins you should do before exposing anything to the internet.