的Gemfile：
... gem 'paperclip',:git => 'git@github.com:mdrozdziel/paperclip.git' ...
Fetching git@github.com:mdrozdziel/paperclip.git Failed to add the host to the list of known hosts (/home/group_home/.ssh/known_hosts). Permission denied (publickey). fatal: The remote end hung up unexpectedly An error has occurred in git when running `git clone "git@github.com:mdrozdziel/paperclip.git" "/disk1/tmp/build_28099_23931178722320/.bundle/gems/ruby/1.8/cache/bundler/git/paperclip-c032df0dc0463697a1ce5ae3761bec95be700815" --bare --no-hardlinks. Cannot complete bundling.
知道这里有什么问题吗？控制台显示/ home / group_home /不存在…
解决方法
看起来：你提供的git param会导致捆绑器尝试将其拉过ssh.您需要使用公共存储库地址.请尝试以下方法：
gem 'paperclip',:git => 'git://github.com/mdrozdziel/paperclip.git'