There should be some instructions in the README file within the app.
The *Nix app goes on top of a standard Splunk installation. If you are monitoring a single machine that is also the same machine running Splunk, then you can simply install the app on top of that same Splunk machine. The app consists of configurations that gather system information and send them to an index called "os".
If you have other machines and you want to send their data to this same Splunk installation (for searching and indexing), then you would set them up to be Splunk Forwarders that have the *Nix app installed on top of them.
Splunk can perform four basic functions: Indexing, Searching, Forwarding, and acting as a Deployment server. The same binary/build will do one, all, or a mix of these functions. Hope that helps clarify things.
Can I run the scripts from this app remotely to other servers and capture information to be displayed in the dashboards of the Splunk server? I cannot install Splunk in the servers that I want to monitor.
Is that possible? I really like the way the application presents the data.