用 vagrant 安装laravel/homestead 按照官网的步骤一步步来的，启动的时候出现问题-PHP中文网问答

/Users/lijiageng/Homestead/scripts/homestead.rb:108:in `read': No such file or directory @ rb_sysopen - /Users/lijiageng/.ssh/id_rsa (Errno::ENOENT)
from /Users/lijiageng/Homestead/scripts/homestead.rb:108:in `block (2 levels) in configure'
from /opt/vagrant/embedded/gems/gems/vagrant-1.8.1/plugins/kernel_v2/config/vm_provisioner.rb:72:in `call'
from /opt/vagrant/embedded/gems/gems/vagrant-1.8.1/plugins/kernel_v2/config/vm_provisioner.rb:72:in `add_config'
from /opt/vagrant/embedded/gems/gems/vagrant-1.8.1/plugins/kernel_v2/config/vm.rb:321:in `provision'
from /Users/lijiageng/Homestead/scripts/homestead.rb:105:in `block in configure'
from /Users/lijiageng/Homestead/scripts/homestead.rb:104:in `each'
from /Users/lijiageng/Homestead/scripts/homestead.rb:104:in `configure'
from /Users/lijiageng/Homestead/Vagrantfile:28:in `block in <top (required)>'
from /opt/vagrant/embedded/gems/gems/vagrant-1.8.1/lib/vagrant/config/v2/loader.rb:37:in `call'
from /opt/vagrant/embedded/gems/gems/vagrant-1.8.1/lib/vagrant/config/v2/loader.rb:37:in `load'
from /opt/vagrant/embedded/gems/gems/vagrant-1.8.1/lib/vagrant/config/loader.rb:113:in `block (2 levels) in load'
from /opt/vagrant/embedded/gems/gems/vagrant-1.8.1/lib/vagrant/config/loader.rb:107:in `each'
from /opt/vagrant/embedded/gems/gems/vagrant-1.8.1/lib/vagrant/config/loader.rb:107:in `block in load'
from /opt/vagrant/embedded/gems/gems/vagrant-1.8.1/lib/vagrant/config/loader.rb:104:in `each'
from /opt/vagrant/embedded/gems/gems/vagrant-1.8.1/lib/vagrant/config/loader.rb:104:in `load'
from /opt/vagrant/embedded/gems/gems/vagrant-1.8.1/lib/vagrant/vagrantfile.rb:28:in `initialize'
from /opt/vagrant/embedded/gems/gems/vagrant-1.8.1/lib/vagrant/environment.rb:740:in `new'
from /opt/vagrant/embedded/gems/gems/vagrant-1.8.1/lib/vagrant/environment.rb:740:in `vagrantfile'
from /opt/vagrant/embedded/gems/gems/vagrant-1.8.1/lib/vagrant/environment.rb:486:in `host'
from /opt/vagrant/embedded/gems/gems/vagrant-1.8.1/lib/vagrant/environment.rb:208:in `block in action_runner'
from /opt/vagrant/embedded/gems/gems/vagrant-1.8.1/lib/vagrant/action/runner.rb:33:in `call'
from /opt/vagrant/embedded/gems/gems/vagrant-1.8.1/lib/vagrant/action/runner.rb:33:in `run'
from /opt/vagrant/embedded/gems/gems/vagrant-1.8.1/lib/vagrant/environment.rb:473:in `hook'
from /opt/vagrant/embedded/gems/gems/vagrant-1.8.1/lib/vagrant/environment.rb:722:in `unload'
from /opt/vagrant/embedded/gems/gems/vagrant-1.8.1/bin/vagrant:177:in `ensure in <main>'
from /opt/vagrant/embedded/gems/gems/vagrant-1.8.1/bin/vagrant:177:in `<main>'