The software provides three user interfaces. These user interfaces cater to different usage needs of the tool. Testing session controls are available through all interfaces. The harness, which handles the commands that are coming from the user interfaces, does not distinguish between which interface is sending the command. The different user interfaces and their usages are as follows:
GUI: Oracle Java technology-based standalone user interface. The Java GUI must be started on the same machine under test that has the VTS kernel running. The GUI does not allow remote connection.
TTY: An ASCII-based, screen-oriented interface that does not need a graphical window environment. You can use this interface to run the software from a serial terminal or a graphical window tool like a shell tool or a terminal window.
CLI: The most lightweight user interface. Its main advantage is that it can be used in scripts for tool automation. The CLI is provided through the interface called vts_cmd. It is a UNIX shell application that enables you to send a single command to the kernel (vtsk), and receive a reply back.