运行cap deploy后出现以下错误：冷，在amazon ec2中部署我的rails应用程序
failed: "/bin/bash -l -c 'cd /mnt/Best-production/releases && tar xzf /tmp/20130305142552.tar.gz && rm /tmp/20130305142552.tar.gz'" on db01.best.com,app01.best.com,web01.best.com
另外，当我决定继续创建web_tools时，我收到以下错误{ALIAS = tools ROLES = web_tools cap rubber：create}
Rubber[ERROR]: Unable to read rubber configuration from ./config/rubber/rubber.yml
/usr/lib/ruby/1.9.1/psych.rb:203:in `parse': (<unknown>): did not find expected key while parsing a block mapping at line 2 column 1 (Psych::SyntaxError)
请帮忙。我被困在这里
我跟踪了railscast http://railscasts.com/episodes?utf8=%E2%9C%93&search=ec2到字母
问题2。我需要ec2中的操作系统实例来成功运行橡胶吗？