There are many reasons you may want to aggregate log files together into one place. Using Splunk to scrape the log files is a great reason. To do this you need to create symlinks to the Server Log files in a consolidated location.
sudo mkdir /var/log/mule sudo ln -s /usr/local/mule-enterprise-3.6.3/logs /var/log/mule/mule363-1
Repeat for any other MuleSoft servers. Voila you now have a place where your logs are aggregated.