我在Amazon EC2上创建了一个新的linux实例,并下载了.pem文件以允许我SSH登录。

当我试图ssh与:

ssh -i myfile.pem <public dns>

我有:

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@         WARNING: UNPROTECTED PRIVATE KEY FILE!          @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
Permissions 0644 for 'amazonec2.pem' are too open.
It is recommended that your private key files are NOT accessible by others.
This private key will be ignored.
bad permissions: ignore key: amazonec2.pem
Permission denied (publickey).

在这篇文章之后,我尝试chmod +600 .pem文件,但现在当我ssh时,我只是得到

Permission denied (publickey).

我犯了什么小学生的错误? pem文件在我的主文件夹中(在macOS中)。它的权限是这样的:

-rw-------@   1 mattroberts  staff    1696 19 Nov 11:20 amazonec2.pem

当前回答

使用PuTTY登录。它很好,但需要几个步骤。

Get your .pem that was generated when you first made the EC2 instance. Convert the .pem file .ppk using PuttyGen since PuTTY does not read .pem. Open PuTTY and enter your Host Name which is your instance username + Public DNS (Ex. ubuntu@ec2-xxx-xxx-xxx-xxx.region.compute.amazonaws.com). Not your AWS account username. Then navigate to Connection > SSH > Auth. Then add your .ppk file. Click on Browse where it says "Private key file for authentication". Click Open and you should be able to immediately establish connection.

我使用PuTTY 0.66在Windows。

其他回答

问题是文件上的权限集错误。

执行chmod 400 mykey.pem可以很容易地解决这个问题

此解决方案取自AWS说明:

要使SSH正常工作,密钥文件必须是不可公开的。chmod 400 mykey.pem

400通过使其仅为所有者只读来保护它。

您可能使用了错误的用户名登录,因为-

大多数Ubuntu映像都有一个用户Ubuntu 亚马逊的AMI是ec2-user 大多数Debian映像都有根或管理员

登录时,需要调整ssh命令:

ssh -l USERNAME_HERE -i .ssh/yourkey.pem public-ec2-host

使用PuTTY登录。它很好,但需要几个步骤。

Get your .pem that was generated when you first made the EC2 instance. Convert the .pem file .ppk using PuttyGen since PuTTY does not read .pem. Open PuTTY and enter your Host Name which is your instance username + Public DNS (Ex. ubuntu@ec2-xxx-xxx-xxx-xxx.region.compute.amazonaws.com). Not your AWS account username. Then navigate to Connection > SSH > Auth. Then add your .ppk file. Click on Browse where it says "Private key file for authentication". Click Open and you should be able to immediately establish connection.

我使用PuTTY 0.66在Windows。

chmod 400 yourkeyfile.pem 如果你的实例是Amazon linux,那么使用ssh -i yourkeyfile。pem ec2-user@ip 对于ubuntu SSH -i yourkeyfile。pem ubuntu@ip 为centos SSH -i yourkeyfile。pem centos@ip

如果您是从Windows连接,请在本地计算机上执行以下步骤。

Navigate to your .pem file. Right-click on the .pem file and select Properties. Choose the Security tab. Select Advanced. Verify that you are the owner of the file. If not, change the owner to your username. Select Disable inheritance and Remove all inherited permissions from this object. Select Add, Select a principal, enter your username, and select OK. From the Permission Entry window, grant Read permissions and select OK. Click Apply to ensure all settings are saved. Select OK to close the Advanced Security Settings window. Select OK to close the Properties window. You should be able to connect to your Linux instance from Windows via SSH.

在Windows命令提示符中运行以下命令。

使用实例重置和移除显式权限。 Icacls.exe $path /reset icacls.exe $path / grant:R "$($env:USERNAME):(R)" icacls.exe $path /inheritance:r .执行以下命令,禁用继承并移除继承权限

您应该能够通过SSH从Windows连接到您的Linux实例。