MATLAB: How to close system command prompt opened by MATLAB !command

socketsystemtcp/ip

I've seen similar questions but not ones that involve opening the command window/terminal via "!". I'm using a MATLAB-to-Python socket connection and I want to close the command window/terminal at the end. 
% Start the echo server in python.
!python echo_server.py &
% Do some stuff with my sockets.
% Close the connection.
fclose(tcp);
%%% Close the terminal here?
The opened command line/terminal says at the top "C:\WINDOWS\SYSTEM32\cmd.exe" following the closing of the socket.

Best Answer

Hi,
As rightly pointed out by @Walter, the command 
system('Taskkill/IM cmd.exe')
closes all the opened command windows.
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