Connecting to a Linux Instance using Putty


Linux instance can be connected through Putty by using the below method.


SSH private key files generated by Oracle Cloud Infrastructure are not compatible with PuTTY. If you are using a private key file generated during the instance creation process you need to convert the file to a .ppk file before you can use it with PuTTY to connect to the instance.

Convert a generated .key private key file:

  1. Open PuTTYgen.

  2. Click Load, and select the private key generated when you created the instance. The extension for the key file is .key.

  3. Click Save private key.

  4. Specify a name for the key. The extension for the new private key is .ppk.

  5. Click Save.

Connect to the Linux instance using a .ppk private key file:

If the instance uses a key pair that you created using PuTTY Key Generator, use the following procedure.

  1. Open PuTTY.

  2. In the Category pane, select Session and enter the following:

    • Host Name (or IP address):

      <username>@<public-ip-address>

    • Port: 22
    • Connection type: SSH
  3. In the Category pane, expand Window, and then select Translation.
  4. In the Remote character set drop-down list, select UTF-8. The default locale setting on Linux-based instances is UTF-8, and this configures PuTTY to use the same locale.
  5. In the Category pane, expand Connection, expand SSH, and then click Auth.

  6. Click Browse, and then select your .ppk private key file.

  7. Click Open to start the session.

    If this is your first time connecting to the instance, you might see a message that the server's host key is not cached in the registry. Click Yes to continue the connection.

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