15 articles
Go deeper than the dashboard. Master the tools for atomic-level troubleshooting. Learn to use 'strace' to watch a program's interaction with the kernel and 'perf' to find exactly which line of code is consuming your CPU.
Why is your server slow? Master the methodology of performance troubleshooting. Learn to distinguish between CPU-Bound, RAM-Bound, and I/O-Bound issues. Understand the 'Load Average' and learn where to look when the system starts to crawl.
Sift through millions of logs in seconds. Master 'journalctl', the powerful query tool for Systemd. Learn to filter by time, by service, and by priority. Discover how to find exactly what happened during the last boot or a specific hour.
See the invisible packets. Master the tools for deep network inspection. Learn to use 'tcpdump' for terminal-based capture, 'Wireshark' for visual analysis, and 'nmap' for security auditing and port scanning.
Master the essential tools for network diagnosis. Learn the modern 'ip' suite that replaced ifconfig. Understand how to use ping for connectivity, traceroute for path analysis, and identify network interface naming conventions.
Learn to listen when your system talks. Explore the 'dmesg' ring buffer for kernel messages and master 'journalctl' for modern systemd logging. Understand the structure of logs in /var/log and how to rotate them.
What to do when the AI gets it wrong. Advanced troubleshooting for prompt logic and output quality.
Mastering the art of troubleshooting. How to use ChatGPT to fix bugs and perform expert code reviews.
Demystify the red text. Learn how to diagnose and fix the the top 5 most common errors beginners and pros face when working with Docker.
From 'Created' to 'Exited'. Learn the different states a container can inhabit and how to transition between them like a pro.
Master the lifecycle management of Docker. Learn the technical difference between stop and kill, and how to safely prune your environment of abandoned containers.
Master the commands for managing multi-container stacks. Learn how to view aggregate logs, stop services safely, and rebuild images on the fly.
See what's happening inside. Learn how to use 'exec', logs, and remote debuggers to troubleshoot applications running inside Docker containers.
Fail fast. Learn how to test individual nodes in isolation, read the execution JSON, and find the 'Needle in the haystack' when a workflow fails.
Save time and frustration by learning how to identify and fix the most common Python errors made by beginners.