ruby-on-rails - 第一次 Capistrano User.have 问题（Net::SSH::Disconnect：连接被远程主机关闭）

Question

我得到这样的问题。

$ cap deploy:setup

  * executing `deploy:setup'
  * executing "sudo -p 'XXXXXXXXX' mkdir -p /home/railsu/bianbian.com /home/railsu/bianbian.com/releases /home/railsu/bianbian.com/shared /home/railsu/bianbian.com/shared/system /home/railsu/bianbian.com/shared/log /home/railsu/bianbian.com/shared/pids"
    servers: ["74.207.243.205"]
connection failed for: 74.207.243.205 (Net::SSH::Disconnect: connection closed by remote host)

我已经将我的计算机的公钥添加到了 git 中。

/.ssh/authorized_keys

在 deploy.rb

set :application, "mini-saler"
set :repository,  "git@74.207.243.205:mini-saler.git"

set :scm, :git
# Or: `accurev`, `bzr`, `cvs`, `darcs`, `git`, `mercurial`, `perforce`, `subversion` or `none`

role :web, "74.207.243.205"                          # Your HTTP server, Apache/etc
role :app, "74.207.243.205"                          # This may be the same as your `Web` server

set :deploy_to, "/home/railsu/bianbian.com" 

# if you want to clean up old releases on each deploy uncomment this:
# after "deploy:restart", "deploy:cleanup"

set :user, "railsu"
set :password, "XXXXXXXXXX"
set :sudo_prompt, "XXXXXXXXXX"

我的 VPS 是 Linode。

我很确定这是错误的地方。任何想法这是什么样的错误？

感谢大家！！

我在这里看到几个特殊的错误：