了解更详细的信息，请参阅該 AWS 知识中心页面:
https://repost.aws/zh-Hans/knowledge-center/user-data-replace-key-pair-ec2
来自 AWS 的 Emilio，将向大家展示恢复对 Amazon EC2 实例的访问权限的方法。有时，客户会与 AWS 技術支援團隊联系，说明自己丢失了 Amazon EC2 实例的 SSH 私有密钥。如果没有其他用户账户可供登录实例，则您将无法访问该实例。发生这种情况时，可以采取两种方法，恢复对 Amazon EC2 实例的访问权限。
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