cache目录没有权限

App 26772 stderr: Started GET "/investors" for 103.238.226.130 at 2015-08-25 11:25:47 +0800
App 26772 stderr: Processing by InvestorsController#index as HTML
App 26772 stderr: Read fragment views/investors/1-20150825032428475102000/zh-CN/ba9ec9f1a927c00438fab3e53de969e8 (0.2ms)
App 26772 stderr: Write fragment views/investors/1-20150825032428475102000/zh-CN/ba9ec9f1a927c00438fab3e53de969e8 (0.8ms)
App 26772 stderr:   Rendered investors/_investor.html.slim (3.8ms)
App 26772 stderr:   Rendered investors/index.html.slim within layouts/application (10.1ms)
App 26772 stderr: Completed 500 Internal Server Error in 13ms
App 26772 stderr: 
App 26772 stderr: ActionView::Template::Error (Permission denied - /home/ubuntu/campo/releases/20150824101227/tmp/cache/84B):
App 26772 stderr:     1: - cache [investor, locale] do
App 26772 stderr:     2:   .investor-frame
App 26772 stderr:     3:     .investor  id="investor-#{investor.id}"
App 26772 stderr:     4:       .investor-content
App 26772 stderr:   app/views/investors/_investor.html.slim:1:in `_app_views_investors__investor_html_slim___4107010476464905044_55536860‘
App 26772 stderr:   app/views/investors/index.html.slim:40:in `_app_views_investors_index_html_slim___256757312322326570_55623180‘
App 26772 stderr: 

# namei -om /home/ubuntu/campo/releases/20150824101227/tmp/cache
f: /home/ubuntu/campo/releases/20150824101227/tmp/cache
 drwxr-xr-x root   root   /
 drwxr-xr-x root   root   home
 drwxr-xr-x ubuntu ubuntu ubuntu
 drwxr-xr-x root   root   campo
 drwxr-xr-x root   root   releases
 drwxr-xr-x root   root   20150824101227
 drwxr-xr-x root   root   tmp
 lrwxrwxrwx root   root   cache -> /home/ubuntu/campo/shared/tmp/cache
   drwxr-xr-x root   root   /
   drwxr-xr-x root   root   home
   drwxr-xr-x ubuntu ubuntu ubuntu
   drwxr-xr-x root   root   campo
   drwxr-xr-x root   root   shared
   drwxr-xr-x root   root   tmp
   drwxr-xr-x root   root   cache

# chmod 777 /home/ubuntu/campo/shared/tmp/cache/