(4. getting started 4.1 Advice for beginners 4.2 Upgrade old Nagios to current version 4.3 Quick installation guide 4.4 Fedora platform based quick guide 4.5 Quick guide based on openSUSE platform 4.6 Quick guide based on Ubuntu platform 4.7 Monitoring windows host 4.8 Monitoring linux/unix hosts 4.9 Monitoring routers and switches 4.10 Monitoring network printer 4.11 Monitoring Netware server 4.12 Monitoring public service platform 5 Prepare to configure nagios5.1 Configuration overview 5.2 Main profile option 5.3 Object configuration overview 5.4 CGI profile option 6 Basic concepts of Nagios monitoring and configuration 6.1 Object definition 6.2 Time saving tricks for object definition 6.3 User customized object variable 6.4 Object inheritance relationship 6.5 Scheduled Down Time)