我正在尝试在数字海洋上部署我的rails应用程序 . 我正在关注Deploying a Rails App on Ubuntu 14.04 with Capistrano, Nginx, and Puma

这是我第一次部署应用程序,所以花了一天多的时间才能达到第7步

但是现在当我把 cap production deploy:initial 放在终端时它会出现以下错误

DEBUG [63cf0a07] Running [ -d ~/.rvm ] on 162.243.10.38
DEBUG [63cf0a07] Command: [ -d ~/.rvm ]
(Backtrace restricted to imported tasks)
cap aborted!
Net::SSH::Authentication::AgentError: agent could not sign data with requested identity

Tasks: TOP => rvm:hook
(See full trace by running task with --trace)