scpUtil = new ScpUtil(this);
final Session s = scpUtil.getSession();
s.connect();
final String targetFileName = scpUtil.trimTargetFile(url.getPath());
final String command = SCP_COMMAND + targetFileName;
channel = (ChannelExec) s.openChannel(SCP_EXEC);
channel.setCommand(command);
final OutputStream outs = channel.getOutputStream();
responseStream = channel.getInputStream();
channel.connect();
scpUtil.checkAck(responseStream);