Oracle Linux: How to Add/Replace a Passphrase for an existing ssh Key

Applies to: 

Oracle Cloud Infrastructure - Version N/A to N/A [Release 1.0]

Linux x86-64

Goal

How to Add/Replace the Passphrase for existing ssh key

Solution

To add/replace the passphrase for an existing private key without regenerating the keypair by typing the following command:

$ ssh-keygen -p -f <ssh_private key>

Eg:-

$ ssh-keygen -p -f ssh-key-2022-03-29.key
Enter new passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved with the new passphrase.

To replace the existing passphrase with a new one, run the same command it would ask to provide the old passphrase and later provide new passphrase you wish