Once librairies and softwares installed, you can enable the feature in order to make it in production mode. Service will consume about 1.3GB of memory on your server.
On the left menu, choose Your System > Features
On the search field, type Clam
Click on Install on the Clam Antivirus row
You will find a new menu “Clam Antivirus”
You'll notice that the service is red and not started. In fact, you need to wait a few minutes for the signature databases to be updated.