Initial backup: 18 monitoring scripts + timers + docs

- 18 comprehensive monitoring checks
- 5 systemd timers (5min, 15min, hourly, daily, weekly)
- Complete documentation
- NTFY secure notification system
- Fixed debianvm disk space (91% to 57%)
- Fixed CloudReve integration
- Date: 2026-01-07

scripts/check-network.sh

@@ -0,0 +1,44 @@
+#!/bin/bash
+# Monitor public IP and internet speed
+set -euo pipefail
+
+SEND_NTFY="/usr/local/bin/send-ntfy.sh"
+CACHE_FILE="/var/cache/public_ip_pve"
+
+# Check public IP
+CURRENT_IP=$(timeout 10 curl -s https://ifconfig.me 2>/dev/null || echo "FAILED")
+
+if [ "$CURRENT_IP" = "FAILED" ]; then
+    $SEND_NTFY warning "Internet Check Failed" "🟡 WARNING: Cannot detect public IP - internet connection issue?" "warning,globe_with_meridians"
+    exit 1
+fi
+
+# Check if IP changed
+if [ -f "$CACHE_FILE" ]; then
+    OLD_IP=$(cat "$CACHE_FILE")
+    if [ "$CURRENT_IP" != "$OLD_IP" ]; then
+        $SEND_NTFY info "Public IP Changed" "ℹ️ INFO: Homelab public IP changed\nOld: $OLD_IP\nNew: $CURRENT_IP" "globe_with_meridians,info"
+    fi
+fi
+
+echo "$CURRENT_IP" > "$CACHE_FILE"
+
+# Speed test (only if --speedtest flag passed)
+if [ "${1:-}" = "--speedtest" ]; then
+    if command -v speedtest-cli &>/dev/null; then
+        SPEED_RESULT=$(speedtest-cli --simple 2>/dev/null || echo "FAILED")
+        
+        if [ "$SPEED_RESULT" != "FAILED" ]; then
+            UPLOAD=$(echo "$SPEED_RESULT" | grep "Upload:" | awk '{print $2}')
+            UPLOAD_INT=${UPLOAD%.*}
+            
+            if [ "$UPLOAD_INT" -lt 10 ]; then
+                $SEND_NTFY warning "Slow Internet Speed" "🟡 WARNING: Upload speed only $UPLOAD Mbit/s (< 10 Mbit/s)" "snail,warning,globe_with_meridians"
+            else
+                $SEND_NTFY info "Speed Test Result" "ℹ️ INFO: Internet speed test\n$SPEED_RESULT" "globe_with_meridians,zap"
+            fi
+        fi
+    fi
+fi
+
+logger -t network-monitor "Public IP: $CURRENT_IP"