Generate New Private Key Ec2 Instance

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Jun 01, 2012  MicroNugget: What are AWS EC2 Key Pairs? CBT Nuggets trainer Jeremy Cioara explains Amazon Web Services EC2 Key Pairs, including Public/Private Key Cryptography, how Key.

I lost the private key file for the key pair that is used to launch my Amazon Elastic Compute Cloud (Amazon EC2) Windows instance. How can I replace or change the key pair on an EC2 Windows instance?

  1. Put the private key from keypair #2 on the new laptop Try to log in to the instance. If that's what you're describing, then the problem is that keypair #2's public key has never been installed on the EC2 instance. You need the private key on your client, and the matching public key on the server you're connecting to.
  2. Dec 11, 2013 I also generate private key pair using putty for our connection to the instance. Generating Key pairs from amazon ec2 console DBA Pro. How to SSH from one Linux EC2 instance to another.
  3. Learn how to easily generate and add a new public and private key pair to an AWS EC2 instance. This is useful if you ever need to replace a compromised key or provide ssh access to multiple users without sharing private keys. Generate a New Private Key Login to the AWS EC2 console and Continued.
  4. Create a new key pair and save the private key file. You can create a key pair using the console, AWS Command Line Interface (AWS CLI), or AWS Tools for Windows PowerShell. For more information, see Creating a Key Pair Using Amazon EC2. Note: To give the new key pair the same name as the lost key pair, you must first delete the lost key pair.
  5. A key pair is used to control login access to EC2 instances. Currently this resource requires an existing user-supplied key pair. This key pair's public key will be registered with AWS to allow logging-in to EC2 instances. When importing an existing key pair the public key material may be in any format supported by AWS.

Resolution

To change the key pair, create an AMI of the existing instance, and then launch a new instance. You can then select a new key pair by following the instance launch wizard. Follow these steps:

  1. Create a new key pair and save the private key file. You can create a key pair using the console, AWS Command Line Interface (AWS CLI), or AWS Tools for Windows PowerShell. For more information, see Creating a Key Pair Using Amazon EC2.
    Note: To give the new key pair the same name as the lost key pair, you must first delete the lost key pair.
  2. From the Amazon EC2 console, choose Instances from the navigation pane.
  3. Select your instance. From the Description tab, take note of the Instance type, VPC ID, Subnet ID, Security groups, and IAM role for the instance.
  4. Warning: If this instance has an instance store volume, any data on it is lost when the instance is stopped. If the instance shutdown behavior is set to Terminate, the instance terminates when it is stopped. Stop your instance.
  5. Select your instance. For Actions, choose Image, Create Image. For Image name, enter a name.
    (Optional) For Image description, enter a description.
  6. Choose Create Image, and then choose Close.
  7. Choose AMIs from the navigation pane. If the Status is pending, the AMI is still being created. When the Status is available, continue to the next step.
  8. Select the AMI, and then choose Launch.
  9. Complete the wizard. Be sure to select the same Instance type, VPC ID, Subnet ID, Security groups, and IAM role as the instance that you are replacing.
    For Select a key pair, choose the new key pair.
  10. (Optional) If the original instance has an associated Elastic IP address, reassociate the Elastic IP address to the new instance.
  11. (Optional) If any EBS volumes aren't captured during the AMI creation, detach the volume, and then attach the volume to the new instance.
    Note: When you detach the volume, you can skip the step to unmount the volume, because the original instance is already in stopped state.
  12. Terminate the stopped instance.

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