Hello, i'm an expert IT with more 15 years of experience in IT industry . i'm certified Cisco networking professional 300-100 and 300-115 and Linux professional lpi 101, 102 and RHCSA and VCP 4, 5,5.5 and Data Center and MSCA/MSCE ranging from 2003 to 2012 . i will give a template for nagios cors with snmp and nsclient++ to monitoring windows linux and switching router and i will teatch you Have to add remove host and troublesoot nagios