Delete the line containing the SSH public key that you want to remove from the authorized_keys files associated with the opc user (/home/opc/.ssh/authorized_keys) and the oracle user (/home/oracle/.ssh/authorized_keys).
The authorized_keys files may contain numerous keys and altering or removing the wrong key may result in a loss of functionality. To minimize the likelihood of an error make a copy of each authorized_keys file before making any modification. Also, rather than deleting the line containing the public key that you wish to remove, you can disable the key by tagging it with the @revoked marker. For example:
Click on a VPS and click on Manage VPS, to go to the management page.On the Overview page, select Access tab and click Add SSH key.Enter the name of the SSH key and the Public key, and click Submit. The SSH key is generated and provides a fingerprint (short way to identify the long Public key).
After your inactive SSH key is deleted, you must generate a new SSH key and associate it with your account. For more information, see "Generating a new SSH key and adding it to the ssh-agent" and "Adding a new SSH key to your GitHub account."
You can use the gpg –delete-secret-key command followed by the KeyID or key fingerprint to delete the secret key and gpg –delete-key command followed by the KeyID or key fingerprint to delete the public key.
To completely remove a user's access, enter the ZSSHD MANAGE command with the DELETE and ALLKEYS parameters specified. This command removes the key file for the specified user (/certs/authorized_keys/ username . keys) and revokes their access to the SSH server.
If you cannot see the "Settings" tab, select the dropdown menu, then click Settings. In the "Security" section of the sidebar, click Deploy keys. On the "Deploy keys" page, take note of the deploy keys associated with your account. For those that you don't recognize, or that are out of date, click Delete.
To delete the SSH public key: In the application web interface window, select the Settings → Application access → SSH access section.This opens the SSH public key table.Select the key that you want to delete.
Connect to the compute node as the opc user. See Connecting to a Compute Node Through Secure Shell (SSH). Delete the line containing the SSH public key that you want to remove from the authorized_keys files associated with the opc user ( /home/opc/. ssh/authorized_keys ) and the oracle user ( /home/oracle/.
To delete the local key pair, run rsa local-key-pair destroy command. If the host key pair and the service key pair of an SSH server are deleted, run the rsa local-key-pair create command to create the new host key pair and service key pair for the SSH server.
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