Module 3.1.1 The Arduino Command Line.

I tried to compile the example code in this tutorial, but run into the following error:

" 'cmdHello' was not declared in this scope"

My code is below"

#include <cmdArduino.h>
void setup() {
  // put your setup code here, to run once:
  // Initializes serial port and structures needed bt the command line.
  //Similar ro Serial.begin(baudrate)

  cmd.add("Hello", cmdHello);
  //adds a new command to the command line
  // the command list is the list of command functions we create


void loop() {
  // put your main code here, to run repeatedly:
//Checks the serial port tosee if a command keyword has been typed into the monitor
// Check checks if keyword mthces a command specified in the command list
// If there's a match, cmd.poll() calls the function specified for that command keyword.
// Case sensitive: Hello and hello are different


void cmdFunctionName(int argCnt, char**args){
  Serial.println("Hello Command line");

Can anyone help me find a solution?