Add Check_scripts/Linux - RAM usage monitor.sh

Check_scripts/Linux - RAM usage monitor.sh

@@ -0,0 +1,55 @@
+#!/bin/bash
+# Usage: "Linux - RAM usage monitor.sh 80 95"
+# 
+# Description:
+#   This script is used from inside of Tactical RMM instances to check the RAM usage. 
+#   This script should be deployed as a check script.
+#
+# Options:
+#   Arg1 - Warning limit
+#   Arg2 - Error limit
+#
+# Author: D. de Kooker (info@dcomputers.nl)
+# Sources: https://www.activexperts.com/support/network-monitor/online/linux/
+# Changelog :
+#   27-06-2022 - Initial script from source, tweaked for my environment
+
+#region Parameters, functions and global variables
+  nWarnMemoryUsage=$1
+  nMaxMemoryUsage=$2
+#endregion
+# Validate number of arguments
+if [ $# -ne 2 ] ; then
+  echo "UNCERTAIN: Invalid number of arguments - Usage: memory nMaxMemoryUsage"
+  exit 1
+fi
+
+# Validate numeric parameter nMaxMemoryUsage
+regExpNumber='^[0-9]+$'
+if ! [[ $1 =~ $regExpNumber ]] ; then
+  echo "UNCERTAIN: Invalid argument: nMaxMemoryUsage (number expected)"
+  exit 1
+fi
+
+# Check the memory usage
+nMemoryPercentage=`ps -A -o pmem | tail -n+2 | paste -sd+ | bc`
+nMemoryPercentage=$( echo "$nMemoryPercentage / 1" | bc )
+
+if [ $nMemoryPercentage -le $nWarnMemoryUsage ] ; then
+  echo "SUCCESS: Memory usage is [$nMemoryPercentage%]"
+  echo ""
+  echo "Warning limit=[$1%], Error limit=[$2%]"
+  exit 0
+fi
+if [ $nMemoryPercentage -gt $nWarnMemoryUsage -a $nMemoryPercentage -le $nMaxMemoryUsage ] ; then
+  echo "WARNING: Memory usage is [$nMemoryPercentage%]"
+  echo ""
+  echo "Warning limit=[$1%], Error limit=[$2%]"
+  exit 2
+fi
+if [ $nMemoryPercentage -gt $nMaxMemoryUsage ] ; then
+  echo "ERROR: Memory usage is [$nMemoryPercentage%]"
+  echo ""
+  echo "Warning limit=[$1%], Error limit=[$2%]"
+  exit 1
+fi