Is there a way to run a silent install for the CA Workload Automation Agent for Application Services?

The PluginInstaller utility doesn't have an option for a properties file like the main agent. However, it does accept an argument for a file that contains standard input. For the Application Services plugin install, that input file would need the following two lines...

N
A

The first is the response to whether you want to create an alias, and the second is for when it asks if you want to override an existing file. Create a file that contains those two lines and save it in the agent directory alongside the pak file. You would then run the installer like this from the agent directory...

./PluginInstaller appservices.pak . ./stdinfile