Guys, thank you.
Please correct me if i am wrong on the following.
unixadmins is configured as a contact group and the contacts have given a valid email addresses to send notification.
Aim: Start monitoring a solaris server using check_ping and if it is not pingable send alerts to unixadmins
Step 1) Create a hosts.cfg file at /opt/local/nagios/etc/objects
Step 2) edit hosts.cfg and put the following entry.
Step 3) do the pre-flight check. Do you think this will work ?