add check_uptime

check_uptime.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+
+# Get the uptime start time
+UPTIME_OUTPUT=$(uptime -s)
+UPTIME_EXIT_CODE=$?
+
+# Check if the uptime command was successful
+if [ $UPTIME_EXIT_CODE -ne 0 ]; then
+  echo "UNKNOWN - Unable to get uptime"
+  exit 3
+fi
+
+# Calculate the uptime in seconds
+UPTIME_START=$(date -u -d "$UPTIME_OUTPUT" +%s)
+CURRENT_TIME=$(date -u +%s)
+UPTIME_SECONDS=$((CURRENT_TIME - UPTIME_START))
+
+# Convert the uptime seconds to hours
+UPTIME_HOURS=$(echo "scale=2; $UPTIME_SECONDS / 3600" | bc)
+
+# Get the human-readable uptime
+UPTIME_HUMAN=$(uptime -p)
+
+# Print the result and performance data
+echo "OK - Uptime: $UPTIME_HUMAN | uptime_hours=$UPTIME_HOURS"
+exit 0