我使用 Capistrano 将我的 rails 3 应用程序部署到生产服务器上。部署正确，应用程序服务器正确重启，但是当我登录生产服务器并进入“my_path/current”时，我无法运行“rails c”：
The program 'rails' is currently not installed. You can install it by typing:
sudo apt-get install rails
我检查了 gem 列表，但一切似乎都已正确安装。
我的 config/deploy.rb 文件是：
require "bundler/capistrano"
# Add RVM's lib directory to the load path.
$:.unshift(File.expand_path('./lib', ENV['rvm_path']))
# Load RVM's capistrano plugin.
require "rvm/capistrano"
set :rvm_ruby_string, '1.9.3'
set :rvm_type, :user # Don't use system-wide RVM
set :application, "MyApp"
set :repository, "git@github.com:user/myapp.git"
set :scm, :git
set :branch, "master"
set :scm_verbose, true
set :scm_username, "user" # GITHUB user name
set :user, "user" # VPS user name
set :scm_passphrase, "pass" # VPS password
set :deploy_to, "/home/luc/be"
set :use_sudo, false
server "my_server", :web, :app, :db, :primary => true
# start / stop application server
namespace :deploy do
task :start do
invoke_command "cd /home/luc/be/current; bundle exec thin start -C config/thin.config"
end
task :stop do
invoke_command "cd /home/luc/be/current; bundle exec thin stop -C config/thin.config"
end
task :restart do
invoke_command "cd /home/luc/be/current; bundle exec thin restart -C config/thin.config"
end
end