#debugging
All articles tagged #debugging — practical guides from production experience.
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50 posts tagged #debugging · page 2 of 6
ping vs curl vs telnet: Which to Use for Network Testing
Know when to use ping, curl, and telnet for network testing — what each tool tests, what its limitations are, and which to reach for first when debugging connectivity issues.
Nginx 502 Bad Gateway Fix: Root Causes and Solutions
Fix nginx 502 bad gateway errors — identify the root cause from the error log, fix upstream connection issues, keepalive config, and timeout problems in production.
netstat vs ss: Which to Use and What's the Difference
netstat vs ss — understand the differences, when to use each, equivalent command translations, and why ss is the modern replacement for netstat on Linux.
How to Monitor Real-Time Logs in Linux: tail, journalctl, multitail
Monitor real-time logs in Linux using tail -f, journalctl -f, and multitail — follow multiple log files simultaneously, filter live output, and build production log monitoring workflows.
Linux tail Multiple Files: Real Examples and Techniques
tail multiple files in Linux simultaneously — using tail -f, multitail, and journalctl to monitor several log files at once in real production scenarios.
Linux sort Command: Real Usage Examples
Use the Linux sort command effectively — sort by column, numerically, by size, reverse order, deduplicate, and combine with other commands for real log and data analysis.
Linux Move Files Between Directories: mv and rsync Examples
Move files between directories in Linux using mv and rsync — handle cross-filesystem moves, rename files, move with wildcards, and avoid common mistakes.
Linux Kill Process by Port: Step-by-Step Guide
Kill a process by port number on Linux — using fuser, lsof, ss + kill, and pkill. Step-by-step with real examples for each method.
How to Find Process by Name in Linux: pgrep, ps, pidof
Find a Linux process by name using pgrep, ps, pidof, and top — with real examples for scripting, killing, and monitoring processes in production.