ruby - Net::SFTP 无法通过 rake 任务连接到主机

Question

我正在尝试编写一个 rake 任务，它使用 sftp 自动连接到Experian主机。

来自 Experian 的人给了我这个命令，让我使用 SFTP 连接到他们的服务器：

sftp -o PreferredAuthentications=password -o PubkeyAuthentication=no username@experian_ip

当我在终端上运行它时，它工作得很好。

然后我根据该命令编写了一个 rake 任务：

require 'net/sftp'

task :experian_sts => [:environment] do

  hostname = "experian_ip"
  username = "username"
  password = "password"

  @cmd = "test"

  begin
    sftp = Net::SFTP.start(hostname, username, password: password, keys_only: false, number_of_password_prompts: 0)
    res = sftp.exec!(@cmd)
    sftp.close
    puts res
  rescue
    puts "Unable to connect to #{hostname} using #{username}/#{password}"
  end

end

但这项任务似乎不起作用。有什么帮助吗？

---

更新

删除救援后看到错误：

rake aborted!
Net::SSH::Disconnect: disconnected: Too many bad authentication attempts! (11)
/Users/ryzal/Sites/rentlord/lib/tasks/experian_sts.rake:12:in `block in <top (required)>'
/Users/ryzal/.rbenv/versions/2.3.1/bin/bundle:22:in `load'
/Users/ryzal/.rbenv/versions/2.3.1/bin/bundle:22:in `<main>'
Tasks: TOP => experian_sts
(See full trace by running task with --trace)