External Commands Reference - ENABLE_HOST_CHECK
ENABLE_HOST_CHECK;host_name
Enables (regularly scheduled and on-demand) active checks of the specified host.
#!/bin/sh
# This is a sample shell script showing how you can submit the ENABLE_HOST_CHECK command
# to Naemon. Adjust variables to fit your environment as necessary.
printf "[%lu] ENABLE_HOST_CHECK;host1\n" `date +%s` > /var/lib/naemon/naemon.cmd