SSH keys enable the automatic authentication of users over SSH without a password to access your instance. Reinstalling SSH keys wipes the instance and reinstalls the operating system to apply a new SSH key details.
Follow this guide to reinstall SSH keys on a Vultr Cloud Compute instance using the Vultr Customer Portal.
Navigate to Products and click Compute.
Click your target instance to open its management page.
Navigate to the Settings tab.
Find and click Reinstall SSH Keys on the left navigation menu.
Click the target SSH key available in your Vultr account, and click Reinstall to add the key.
Check the confirmation prompt and click Reinstall SSH Keys to apply changes, reinstall the server file system and enable the new key.