Backstory: I'm using tomcat7 to host Java Spring code for an API with Ionic but we discovered that file:// gets blocked by tomcat7 service and Ionic sends an origin of file://. This is a bug that was fixed in 7.0.71. Apt-Get Install tomcat7 only installs tomcat7=7.0.52 on Ubuntu 14.04 so I had to manually install 7.0.71 through a zip file in /opt/tomcat7 folder using the instructions here: http://tecadmin.net/install-tomcat-7-on-ubuntu/#
So now that you know why I don't have a user in /etc/default, I need tomcat7 to own a folder since I only want tomcat7 to have the permissions to store to that folder. How do I make this happen?