Ensure the required dependencies are installed as follows:
apt-get install libgtk2-perl libsoap-lite-perl freerdp-x11 tigervnc-viewer
To launch RemoteBox, unpack the previously downloaded RemoteBox tarball and run the ‘remotebox’ executable.
vboxweb-service need to be installed and active on the target server.
The following article describe how to install a Headless Server on CentOS 7.