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 5 of 9
How to Extract tar.gz in Linux: All Formats Covered
Extract tar.gz files in Linux — handle .tar.gz, .tar.bz2, .tar.xz, and .zip formats, extract to specific directories, and handle common extraction errors.
How to Delete Large Files in Linux Safely
Delete large files in Linux safely — handle open file handles, free disk space immediately with truncate, use rm correctly, and recover from accidental deletion.
How to Copy Files Recursively in Linux: cp, rsync Examples
Copy files recursively in Linux with cp and rsync — preserve permissions, sync directories, copy over SSH, and handle large transfers efficiently.
How to Check Uptime in Linux: uptime, w, and Beyond
Check Linux server uptime with uptime, w, and /proc/uptime — read load average correctly, find when the last reboot happened, and script uptime checks.
How to Check DNS Server in Linux: dig, nslookup, resolvectl
Check which DNS server Linux is using with resolvectl, dig, and cat /etc/resolv.conf — verify DNS resolution, test specific servers, and debug DNS configuration.
How to Find Large Files in Linux: Practical Guide
Find large files in Linux using find, du, and ncdu — with real command examples for disk cleanup, log hunting, and storage audits on production servers.
Docker Inspect Container IP Address: Step-by-Step
Get a Docker container's IP address using docker inspect, docker exec, and network commands — with real examples for bridge, host, and custom networks.
Docker Container Not Starting: Fix Guide
Fix Docker container not starting — diagnose exit codes, read container logs, resolve port conflicts, permission errors, and OOM kills in production.
DNS Not Resolving in Linux: Fix Guide
Fix DNS not resolving in Linux — diagnose with dig and nslookup, check resolv.conf and systemd-resolved, and fix DNS for containers, VMs, and production servers.