Installing Munin on Ubuntu 16.04 is not the hard. Munin is a monitoring system that runs over the network for the local server and remote servers. It monitors all the basics out of the box. We can use it to monitor servers of all types to see what has happened and help find out why stuff broke or started to go slow.
If you want to see loads of stats for your web site try Installing AWstats on Ubuntu 16.04 LTS. Number of visitor, Waht OS or Browser they used.
Installing AWstats on Ubuntu 16.04 LTS and some additional packages necessary for the geo and net IP location stats.
sudo apt-get install awstats libgeo-ipfree-perl libnet-ip-perl