add tests to detect if virtual machine

zabbix_agent.sh

@@ -16,12 +16,19 @@ fi
 
 # get OS ditro and version
 OS=$(hostnamectl | awk '/Operating System/ {print $3}')
+VM=$(hostnamectl | awk '/Virtualization/ {print $2}')
 if [ ${OS} == 'Ubuntu' ]; then
 	OS_VER=$(hostnamectl | awk '/Operating System/ {print $4}')
 else
 	OS_VER=$(hostnamectl | awk '/Operating System/ {print $5}')
 fi
 
+if [ "${VM}" == "vmware" ]; then
+	VM="true"
+else
+	VM="false"
+fi
+
 # zabbix server
 ZABBIX_SERVER="gauntzabbix.home.johnhgaunt.com"