It's hard to know what you're asking here, because you left your question blank with no details.
If you are asking for instructions to install the universal forwarder, see the Forwarding Data manual, starting with Deploy a *nix universal forwarder manually.
If you are asking for instructions about how to configure the deployment server, start with Plan a deployment in the Updating Splunk Enterprise Instances manual. The configuration instructions immediately follow that topic.
If your question is about installing the Unix app and add-ons, see the documentation for the Splunk App for Unix and Linux.
If you're asking about something else...please update your question with what you are really trying to learn!
