This topic describes three ways to view public key information. If you want to configure the same public key file for a group of ECS instances but the public key file has no backups in your PC, you can view public key information by using the following methods.

Windows

To view public key information, perform the following operations:

  1. Start PuTTYgen.
  2. Click Load.
  3. Select the .ppk or .pem file.
    PuTTYgen then displays the public key information.

Linux or macOS

Run the ssh-keygen command with the path of the .pem file specified.
ssh-keygen -y -f /path_to_key_pair/my-key-pair.pem
The following example shows the returned public key information:
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABA****+GF9q7rhc6vYrExwT4WU4fsaRcVXGV2Mg9RHex21hl1au77GkmnIgukBZjywlQOT4GDdsJy2nBOdJPrCEBIPxxxxxxxxxx/fctNuKjcmMMOA8YUT+sJKn3l7rCLkesE+S5880yNdRjBiiUy40kyr7Y+fqGVdSOHGMXZQPpkBtojcxxxxxxxxxxx/htEqGa/Jq4fH7bR6CYQ2XgH/hCap29Mdi/G5Tx1nbUKuIHdMWOPvjxxxxxxxxxx+lHtTGiAIRG1riyNRVC47ZEVCxxxxxx
Note If the command fails, run the chmod 400 my-key-pair.pem command to modify the permissions to ensure that only you can view the file.

View the public key information in the instance

The public key information is in the ~/.ssh/authorized_keys file. Open the file in the instance to view the public key information.