背景 开始在 CentOS 下部署，最终还是没法成功，便把环境切换到到 Ubuntu12.04 LTS 64 位，开始使用 root 安装 RVM，Ruby 等环境，但是发现每次切换到一般用户下还是无法找到 Ruby，即使将相应脚本添加到~/.bashrc 下也不行。最后还是切换到一般用户下进行。部署完成后，访问出现 403 ForBidden，但是最后将/etc/nginx/nginx.conf 下的 user 改成了与 Rails app 目录一样的用户就顺利解决。

问题 ForBidden 问题解决后，但是再次访问便出现：

We're sorry, but something went wrong
If you are the application owner check the logs for more information

查看 error.log 文件后还是没看明白到底怎么回事，error.log 文件信息如下：

error.log

2014/04/21 09:58:48 [info] 573#0: Using 32768KiB of shared memory for push module in /etc/nginx/nginx.conf:74
[ 2014-04-21 09:58:48.3969 574/7f34ede5c740 agents/Watchdog/Main.cpp:538 ]: Options: { 'analytics_log_user' => 'nobody', 'default_group' => 'nogroup', 'default_python' => 'python', 'default_ruby' => 'ruby', 'default_user' => 'nobody', 'log_level' => '0', 'max_pool_size' => '6', 'passenger_root' => '/usr/lib/ruby/vendor_ruby/phusion_passenger/locations.ini', 'passenger_version' => '4.0.41', 'pool_idle_time' => '300', 'temp_dir' => '/tmp', 'union_station_gateway_address' => 'gateway.unionstationapp.com', 'union_station_gateway_port' => '443', 'user_switching' => 'true', 'web_server_passenger_version' => '4.0.41', 'web_server_pid' => '573', 'web_server_type' => 'nginx', 'web_server_worker_gid' => '1001', 'web_server_worker_uid' => '1000' }
[ 2014-04-21 09:58:48.4022 577/7fce99aab740 agents/HelperAgent/Main.cpp:643 ]: PassengerHelperAgent online, listening at unix:/tmp/passenger.1.0.573/generation-0/request
[ 2014-04-21 09:58:48.4119 582/7fcbcd884740 agents/LoggingAgent/Main.cpp:321 ]: PassengerLoggingAgent online, listening at unix:/tmp/passenger.1.0.573/generation-0/logging
[ 2014-04-21 09:58:48.4153 574/7f34ede5c740 agents/Watchdog/Main.cpp:728 ]: All Phusion Passenger agents started!
[ 2014-04-21 09:58:48.4267 582/7fcbcd884740 agents/LoggingAgent/Main.cpp:289 ]: Caught signal, exiting...
[ 2014-04-21 09:58:49.4683 620/7f4c97015740 agents/Watchdog/Main.cpp:538 ]: Options: { 'analytics_log_user' => 'nobody', 'default_group' => 'nogroup', 'default_python' => 'python', 'default_ruby' => 'ruby', 'default_user' => 'nobody', 'log_level' => '0', 'max_pool_size' => '6', 'passenger_root' => '/usr/lib/ruby/vendor_ruby/phusion_passenger/locations.ini', 'passenger_version' => '4.0.41', 'pool_idle_time' => '300', 'temp_dir' => '/tmp', 'union_station_gateway_address' => 'gateway.unionstationapp.com', 'union_station_gateway_port' => '443', 'user_switching' => 'true', 'web_server_passenger_version' => '4.0.41', 'web_server_pid' => '619', 'web_server_type' => 'nginx', 'web_server_worker_gid' => '1001', 'web_server_worker_uid' => '1000' }
[ 2014-04-21 09:58:49.4738 623/7fd1e0cab740 agents/HelperAgent/Main.cpp:643 ]: PassengerHelperAgent online, listening at unix:/tmp/passenger.1.0.619/generation-0/request
[ 2014-04-21 09:58:49.4829 628/7fd04aabf740 agents/LoggingAgent/Main.cpp:321 ]: PassengerLoggingAgent online, listening at unix:/tmp/passenger.1.0.619/generation-0/logging
[ 2014-04-21 09:58:49.4898 620/7f4c97015740 agents/Watchdog/Main.cpp:728 ]: All Phusion Passenger agents started!
App 657 stdout:
App 657 stderr: Instance method "open" is already defined in Object, use generic helper instead or set StateMachine::Machine.ignore_method_conflicts = true.
App 657 stderr:
[ 2014-04-21 09:59:05.3109 623/7fd1e0bb3700 Pool2/SmartSpawner.h:301 ]: Preloader for /var/www/bebety.com/current started on PID 657, listening on unix:/tmp/passenger.1.0.619/generation-0/backends/preloader.657
App 806 stdout: