ruby-on-rails – 无效命令’PassengerDefaultRuby’

Phusion Passenger version 4.0.25

ruby 2.0.0p247 (2013-06-27 revision 41674) [i686-linux]

Server version: Apache/2.2.22 (Ubuntu)
Server built:   Jul 12 2013 13:38:21

我按照apache.conf中的乘客指示粘贴这三行

LoadModule passenger_module /usr/local/rvm/gems/ruby-2.0.0-p247/gems/passenger-4.0.25/buildout/apache2/mod_passenger.so
PassengerRoot /usr/local/rvm/gems/ruby-2.0.0-p247/gems/passenger-4.0.25
PassengerDefaultRuby /usr/local/rvm/wrappers/ruby-2.0.0-p247/ruby

这是我安装的ruby的详细信息

rvm rubies

   ruby-1.9.3-p448 [ i686 ]
=* ruby-2.0.0-p247 [ i686 ]

如果我重新启动Apache,我会得到以下错误.

[Wed Nov 20 15:04:13 2013] [warn] module passenger_module is already loaded,skipping
Syntax error on line 242 of /etc/apache2/apache2.conf:
Invalid command 'PassengerDefaultRuby',perhaps misspelled or defined by a module not included in the server configuration
Action 'configtest' failed.
The Apache error log may have more information.
   ...fail!

我做了很多谷歌搜索,但发现only one link没有多大帮助.