code: def install(packages, options=None, fatal=False):
      
      cmd = ['yum', '--assumeyes']
      if options is not None:
          cmd.extend(options)
      cmd.append('install')
      if isinstance(packages, six.string_types):
          cmd.append(packages)
      else:
          cmd.extend(packages)
      log("Installing {} with options: {}".format(packages,
                                                  options))
      _run_yum_command(cmd, fatal)
docs: Install one or more packages.