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嘗試安裝任何vagrant插件時遇到問題。安裝vagrant插件時出現問題
vagrant plugin install vagrant-aws
vagrant plugin install vagrant-awsinfo
，我最終得到的錯誤是這樣的：
Installing the 'vagrant-aws' plugin. This can take a few minutes...
Bundler, the underlying system Vagrant uses to install plugins,
reported an error. The error is shown below. These errors are usually
caused by misconfigured plugin installations or transient network
issues. The error from Bundler is:
Authentication is required for http://gems.hashicorp.com/.
Please supply credentials for this source. You can do this by running:
bundle config http://gems.hashicorp.com/ username:password
我是代理服務器的後面。不確定這個問題與它有什麼關係。