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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def ExecuteCmd(cmd, quiet=False):
 """ Run a command in a shell. """

  result = None
  if quiet:
    with open(os.devnull, "w") as fnull:
      result = subprocess.call(cmd, shell=True, stdout=fnull, stderr=fnull)
  else:
    result = subprocess.call(cmd, shell=True)
  return result