我正在尝试将应用程序部署到亚马逊网络服务器。我已经安装并运行了 git（我已经成功推送。但是当我尝试进行 cap deploy 时，我得到“权限被拒绝”
这是错误：
servers: ["22.229.78.34"]
[ubuntu@22.229.78.34] executing command
** [22.229.78.34 :: out] Cloning into '/home/ubuntu/liquid_admin/releases /20130703153332'...
** [22.229.78.34 :: out] Permission denied (publickey).
** fatal: The remote end hung up unexpectedly
command finished in 779ms
*** [deploy:update_code] rolling back
这是部署文件：
require 'bundler/capistrano'
set :user, 'ubuntu'
set :domain, 'ubuntu@22.229.78.34'
set :applicationdir, "~/liquid_admin"
set :scm, 'git'
set :repository, "ssh://ubuntu@22.229.78.34/~/liquid_admin.git"
set :git_enable_submodules, 1 # if you have vendored rails
set :branch, 'master'
set :git_shallow_clone, 1
set :scm_verbose, true
set :application, "liquid.radio"
# set :scm, :git # You can set :scm explicitly or Capistrano will make an intelligent guess based on known version control directory names
或：accurev, bzr, cvs, darcs, git, mercurial, perforce,subversion或none
role :web, "ubuntu@22.229.78.34" # Your HTTP server, Apache/etc
role :app, "ubuntu@22.229.78.34" # This may be the same as your ` Web` server
role :db, "ubuntu@22.229.78.34", :primary => true # This is where Rails migrations will run
set :deploy_to, "~/liquid_admin"
set :deploy_via, :export
default_run_options[:pty] = true
namespace :deploy do
task :start do ; end
task :stop do ; end
task :restart, :roles => :app, :except => { :no_release => true } do
可能是一个愚蠢的时间问，但我想知道我是否需要已经安装了 ruby 和 rails 才能工作。无论如何，我现在就去做......但我只是想知道（不知道 cap 是否适合你。）
但除此之外......为什么它会失败？
git 再次设置并运行良好。推送效果很好。SSH 工作正常。我应该注意的另一件事是，我在运行 ubuntu@22.229.78.34 和仅运行 22.229.78.34 时都尝试了它。我是用 ubuntu 方式做的，因为这通常是亚马逊接受连接的唯一方式。任何帮助，将不胜感激。