code: public void signal(String signal) throws SshException {
  
  		ByteArrayWriter request = new ByteArrayWriter();
  		try {
  
  			request.writeString(signal);
  
  			sendRequest("signal", false, request.toByteArray());
  		} catch (IOException ex) {
  			throw new SshException(ex, SshException.INTERNAL_ERROR);
  		} finally {
  			try {
  				request.close();
  			} catch (IOException e) {
  			}
  		}
  	}
docs: Send a signal to the remote process. A signal can be delivered to the
  remote process using this method, some systems may not implement signals.
  The signal name should be one of the following values: <blockquote>
  
  <pre>
  ABRT
  ALRM
  FPE
  HUP
  ILL
  INT
  KILL
  PIPE
  QUIT
  SEGV
  TERM
  USR1
  USR2
  </pre>
  
  </blockquote>
  
  @param signal
  @throws IOException