1. You confirm that "BL-WS" PC was turned on the switch.
2. You should open the "Xterm" window by clicking the right mouse button of Linux PC.
3.If you open the "Xterm" window, you should input the following command and Enter key. ["( )"=space]
{ ps () x }
4.You should find PID number of the object window and enter the following command. ["( )"=space]
{ kill( )-9( )[ PID Number ] }
5. Restart GUI
