In this example the hostname (-H) will be supplied by $HOSTADDRESS$ which is taken from the address field of the pear host definition.The value passed into the -u parameter should be a relative path, for example: /total?eId=12345&env=abcde.We'll add the -u to the check_http_with_args command definition so we don't have to pass it as part of our parameters in our service definition.