Anti-Virus Installation

I have ERPnext installed on Ubuntu Desktop 16.04 - Do i need AV installed?

I will have users uploading files to the system - so I need some sort of protection?

While Linux is not generally subject to viruses, storage of files that contain Windows viruses can cause them to spread if other users download them. There are antivirus programs that you can install on Ubuntu that will scan for viruses, the one that comes to mind is ClamAV which is available in the software channels. There are others that can be installed from other sources.

Thanks - do i need to exclude any directories?