Linux & DevOps Troubleshooting Blog
Practical guides for Linux engineers — NGINX debugging, process troubleshooting, CIS hardening, and production incident response.
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79 posts · page 3 of 9
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.
Linux Find Files Older Than X Days: find -mtime Examples
Find files older than X days in Linux using find -mtime — with real examples for log cleanup, archiving old files, and safe deletion workflows.
Linux Find File by Name and Size: Real Examples
Use Linux find command to locate files by name pattern, size, date, and permissions — with real production examples and combined search techniques.
Linux Check Running Services with systemctl: Real Examples
Check running services in Linux using systemctl — list active units, find failed services, check service status, and filter by type with real command examples.