Assuming you are using Pandora FMS 6.0, the steps are:
1. Create the [Alert command](http://wiki.pandorafms.com/index.php?title=Pandora:Documentation_en:Alerts#The_Alert_Command_.28Pandora_Versions_5_and_above_only.29) in Pandora FMS console following the instructions of your solution inside this folder
2. Define the [Alert Action](http://wiki.pandorafms.com/index.php?title=Pandora:Documentation_en:Alerts#Alert_Actions_.28all_Pandora_FMS_versions_including_5.0.29) in Pandora FMS console following the instructions of your solution inside this folder
3. Assign the action to an existing module under Alerts -> [List of alerts](http://wiki.pandorafms.com/index.php?title=Pandora:Documentation_en:Alerts#Assigning_Alerts_from_an_Alert.27s_Sub_Menu):

4. Optinionally, go to your agent and verify the alert has been created:

When the alert triggers, the result would be something like this:
