Troubleshooting

Debug Kubernetes pods systematically. Fix CrashLoopBackOff, ImagePullBackOff, pending pods, and OOMKilled with diagnostic commands.

Fix OpenClaw gateway errors: 401 unauthorized, connection refused, origin not allowed, and WebSocket failures with resolution guides.

Learn to read SELinux AVC denial logs, use ausearch and sealert, and follow a systematic troubleshooting workflow for RHEL systems.

Kubernetes troubleshooting checklist. Pod failures, CrashLoopBackOff, networking issues, DNS resolution, and storage fixes.

Linux networking for DevOps. IP configuration, DNS, firewall rules, routing tables, packet capture with tcpdump, and troubleshooting.