title: Capistrano unsupported key type
body: <p>When I do 'cap production deploy' with capistrano on CentOS, I get following errors.</p>
  
  <p>What I'm sure is that my pirvate key for both git and server are both perfect original files, and public key is normally on the server.</p>
  
  <p>And I have 
      ssh_options[:keys] = [File.join(ENV["HOME"], ".ssh", "example-rsa")]
  in my production.rb, and I put the file as /root/.ssh/example-rsa correctly.
  I <strong>ssh-add</strong> ed my private key for git and server.</p>
  
  <p>Strange thing is that even though both files require pass-phrase, my terminal asked me for the password for the git, but <em>not the one for the server</em>.</p>
  
  <p>I synced my version of ruby with the server, opeenssh, and so on.</p>
  
  <pre><code>  triggering start callbacks for `deploy'
    * 2014-02-27 10:09:45 executing `multistage:ensure'
    * 2014-02-27 10:09:45 executing `deploy'
    * 2014-02-27 10:09:45 executing `deploy:update'
   ** transaction: start
    * 2014-02-27 10:09:45 executing `deploy:update_code'
      updating the cached checkout on all servers
      executing locally: "git ls-remote git@github.com:example/AskOnStack.git HEAD"
  *** [deploy:update_code] rolling back
    * executing "rm -rf /home/deployer/apps/AskOnStack/releases/20140227010945; true"
      servers: ["**.**.***.**"]
   ** [deploy:update_code] exception while rolling back: Capistrano::ConnectionError, connection failed for: **.**.***.**:**** 
  
  (NotImplementedError: unsupported key type `��"�ep���ˎ��-�wƿ3�����-���S�(�')
  // this part is the start of errors. what are those strange texts?
  
  /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/recipes/deploy.rb:138:in ``': No such file or directory - git ls-remote git@github.com:mocoga/KakaoGameFriend.git HEAD (Errno::ENOENT)
   from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano- 2.15.5/lib/capistrano/recipes/deploy.rb:138:in `block in run_locally'
   from /home/stackoverflow/.rvm/rubies/ruby-1.9.3-p392-railsexpress/lib/ruby/1.9.1/benchmark.rb:295:in `realtime'
      from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/recipes/deploy.rb:137:in `run_locally'
      from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/recipes/deploy.rb:43:in `block (3 levels) in load'
      from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/recipes/deploy.rb:124:in `with_env'
      from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/recipes/deploy.rb:43:in `block (2 levels) in load'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/recipes/deploy/scm/git.rb:229:in `query_revision'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/recipes/deploy/scm/base.rb:35:in `block in method_missing'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/recipes/deploy/scm/base.rb:63:in `local'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/recipes/deploy/scm/base.rb:35:in `method_missing'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/recipes/deploy.rb:43:in `block in load'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/configuration/variables.rb:87:in `call'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/configuration/variables.rb:87:in `block in fetch'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/configuration/variables.rb:110:in `block in protect'
  from &lt;internal:prelude&gt;:10:in `synchronize'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/configuration/variables.rb:110:in `protect'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/configuration/variables.rb:78:in `fetch'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/configuration/variables.rb:95:in `[]'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/recipes/deploy/strategy/base.rb:86:in `revision'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/recipes/deploy/strategy/remote_cache.rb:35:in `update_repository_cache'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/recipes/deploy/strategy/remote_cache.rb:15:in `deploy!'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/recipes/deploy.rb:253:in `block (2 levels) in load'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/configuration/execution.rb:138:in `instance_eval'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/configuration/execution.rb:138:in `invoke_task_directly'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/configuration/callbacks.rb:25:in `invoke_task_directly_with_callbacks'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/configuration/execution.rb:89:in `execute_task'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/configuration/namespaces.rb:191:in `method_missing'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/configuration/namespaces.rb:110:in `block in define_task'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/recipes/deploy.rb:234:in `block (3 levels) in load'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/configuration/execution.rb:56:in `transaction'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/configuration/namespaces.rb:191:in `method_missing'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/recipes/deploy.rb:233:in `block (2 levels) in load'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/configuration/execution.rb:138:in `instance_eval'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/configuration/execution.rb:138:in `invoke_task_directly'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/configuration/callbacks.rb:25:in `invoke_task_directly_with_callbacks'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/configuration/execution.rb:89:in `execute_task'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/configuration/namespaces.rb:191:in `method_missing'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/configuration/namespaces.rb:110:in `block in define_task'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/recipes/deploy.rb:201:in `block (2 levels) in load'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/configuration/execution.rb:138:in `instance_eval'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/configuration/execution.rb:138:in `invoke_task_directly'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/configuration/callbacks.rb:25:in `invoke_task_directly_with_callbacks'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/configuration/execution.rb:89:in `execute_task'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/configuration/execution.rb:101:in `find_and_execute_task'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/cli/execute.rb:46:in `block in execute_requested_actions'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/cli/execute.rb:45:in `each'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/cli/execute.rb:45:in `execute_requested_actions'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/cli/help.rb:19:in `execute_requested_actions_with_help'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/cli/execute.rb:34:in `execute!'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/lib/capistrano/cli/execute.rb:14:in `execute'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/gems/capistrano-2.15.5/bin/cap:4:in `&lt;top (required)&gt;'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/bin/cap:23:in `load'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/bin/cap:23:in `&lt;main&gt;'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/bin/ruby_executable_hooks:15:in `eval'
  from /home/stackoverflow/.rvm/gems/ruby-1.9.3-p392-railsexpress/bin/ruby_executable_hooks:15:in `&lt;main&gt;'
  </code></pre>