<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">Hi All , I am new to nagios configuration . I successfully installed nagios on one of my linux server and now monitoring two hosts . For monitoring of remote hosts , I created a new config file by renaming localhost.cfg file under objects directory. I renamed the entries "hostname" and "address" and other entries under "DEFINE HOST" directive to point to the new server which I am planning to monitor . The settings looks like this define host{ use linux-server ; Name of host template to use ; This host definition will inherit all variables that are defined ; in (or inherited by) the linux-server host template definition. host_name node1 alias node1 address 192.168.122.167 } define host{ use linux-server ; Name of host template to use ; This host definition will inherit all variables that are defined ; in (or inherited by) the linux-server host template definition. host_name node2 alias node2 address 192.168.122.218 } Also modified "DEFINE SERVICE" directive to monitor few services on both the remote hosts . Few of the settings looks like this define service{ use local-service ; Name of service template to use host_name node1 service_description Current Users check_command check_nrpe!check_users } define service{ use local-service ; Name of service template to use host_name node2 service_description Current Users check_command check_nrpe!check_users } The checks are working fine . But my confusion here is in terms of scalabilty . What if I want to monitor 100 servers and 5 services in each of the servers. Does that mean I need to create 100 "define host" directives for each of these servers . Also , monitoring 5 services means i have to create 5 "define service" for each host , that means 500 "define service" directives. If this is the case , then it will be really painful to configure and manage if there are many servers to monitor. Can't I use comma separated ip address and hosts like this define host{ use linux-server ; Name of host template to use ; This host definition will inherit all variables that are defined ; in (or inherited by) the linux-server host template definition. host_name node1,node2 alias node1 address 192.168.122.167,192.168.122.218 } define service{ use local-service ; Name of service template to use host_name node1,node2 service_description Current Users check_command check_nrpe!check_users } . Will it work . Have not tried yet. What you people suggest should be the approach if somebody is planning to monitor more than 50 servers. Any help will be highly appreciated Thanks in Advance Zaman </td></tr></table>