在Capistrano 3中创建linked_dirs失败

我试图用SilverStripe构建来设置Capistrano,但在设置共享目录时遇到了一些问题。

我设置了linked_dirs 部署.rb 具有以下特征:

set :linked_dirs, %w{assets vendor}

添加此行后,我得到以下错误:

[617afa7f] Command: /usr/bin/env mkdir -p /var/www/website/releases/20160215083713 /var/www/website/releases/20160215083713
INFO [617afa7f] Finished in 0.250 seconds with exit status 0 (successful).
DEBUG [88c3de20] Running /usr/bin/env [ -L /var/www/website/releases/20160215083713/assets ] as capistrano@128.199.231.152
DEBUG [88c3de20] Command: [ -L /var/www/website/releases/20160215083713/assets ]
DEBUG [88c3de20] Finished in 0.258 seconds with exit status 1 (failed).
DEBUG [3d61c1c4] Running /usr/bin/env [ -d /var/www/website/releases/20160215083713/assets ] as capistrano@128.199.231.152
DEBUG [3d61c1c4] Command: [ -d /var/www/website/releases/20160215083713/assets ]
DEBUG [3d61c1c4] Finished in 0.254 seconds with exit status 1 (failed).
INFO [3016a8cd] Running /usr/bin/env ln -s /var/www/website/shared/assets /var/www/website/releases/20160215083713/assets as capistrano@128.199.231.152

说到Capistrano,我是一个超级新手,说到服务器配置和权限,我是个半新手,所以任何建议都会很感激。