To run this application you must have QT5 and Protobuf installed. Run the command bellow to install.
sudo apt install qt5-default
sudo apt install libprotobuf-dev
cd Qt-UOL
cd server
sh protobuf.sh
mkdir build
cd build
qmake ..
make
./server
cd Qt-UOL
cd client
sh protobuf.sh
mkdir build
cd build
qmake ..
make
./client