Update troubleshooting.md

2026-08-12 22:34:03 +00:00 · 2026-04-28 11:10:01 -05:00
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+---
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+# 16. docs/troubleshooting.md
+
+```markdown
+# Troubleshooting Guide
+
+## Prometheus Target Down
+
+### Symptoms
+
+Prometheus shows target as DOWN.
+
+### Checks
+
+```bash
+ping TARGET_IP
+curl http://TARGET_IP:9100/metrics
+systemctl status prometheus-node-exporter