在httpd.conf
上添加ff行后LoadModule passenger_module /usr/local/lib/ruby/gems/1.9.1/gems/passenger-3.0.13/ext/apache2/mod_passenger.so
PassengerRoot /usr/local/lib/ruby/gems/1.9.1/gems/passenger-3.0.13
PassengerRuby /usr/local/bin/ruby
Apache将不再启动
[root@localhost ~]# service httpd restart
Stopping httpd: [FAILED]
Starting httpd: [FAILED]
从日志中获取
[Thu Jul 12 11:26:58 2012] [error] *** Passenger could not be initialized because of this error: Unable to start the Phusion Passenger watchdog (/usr/local/lib/ruby/gems/1.9.1/gems/passenger-3.0.13/agents/PassengerWatchdog): Permission denied (13)
[Thu Jul 12 11:26:58 2012] [notice] Digest: generating secret for digest authentication ...
[Thu Jul 12 11:26:58 2012] [notice] Digest: done
[Thu Jul 12 11:27:13 2012] [notice] SELinux policy enabled; httpd running as context root:system_r:httpd_t:s0
[Thu Jul 12 11:27:13 2012] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[Thu Jul 12 11:31:56 2012] [notice] SELinux policy enabled; httpd running as context root:system_r:httpd_t:s0
[Thu Jul 12 11:31:56 2012] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[Thu Jul 12 11:38:22 2012] [notice] SELinux policy enabled; httpd running as context root:system_r:httpd_t:s0
[Thu Jul 12 11:38:22 2012] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
答案 0 :(得分：0)
检查/usr/local/lib/ruby/gems/1.9.1/gems/passenger-3.0.13/agents/PassengerWatchdog上的文件权限，并确保您的apache用户有权运行它。
答案 1 :(得分：0)
我不是SELinux的专家，但那是你问题的原因。 （作为apache用户的权限和对监视程序进程的访问权限。）
尝试查看此处：Passenger/mod_rails fails to initialize in Fedora 12 when starting Apache