SSH连接aws服务器报错：WARNING: UNPROTECTED PRIVATE KEY FILE!

使用ssh命令连接aws服务器，ssh命令如下 ``` $ ssh -i "aws.pem" admin@1.2.3.4 ``` 连接不上服务器，并报错 ``` @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: UNPROTECTED PRIVATE KEY FILE! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ Permissions 0644 for 'aws.pem' are too open. It is required that your private key files are NOT accessible by others. This private key will be ignored. Load key "aws.pem": bad permissions admin@1.2.3.4: Permission denied (publickey). ``` 原因是 aws.pem 文件没有权限，赋权即可，命令如下 ``` chmod 700 aws.pem ``` 再次连接服务器，成功登录