DigitalOcean Droplets are Linux-based virtual machines (VMs) that run on top of virtualized hardware. Each Droplet you create is a new server you can use, either standalone or as part of a larger, cloud-based infrastructure.
When you create a Droplet, you have the option to either add an SSH key to it or to choose a root password.
If you forget or lose the root password, you can reset it using the control panel.
Navigate to the control panel. From the project the Droplet is in, or from the main navigation's Droplets page, locate the Droplet. Click the Droplet's name to open its detail page, then select Access in the left navigation.
Click Reset Root Password to reset the Droplet's password. You will receive an email containing the Droplet's temporary password.
Some operating systems use internally-managed passwords, which means you cannot reset the root password from the control panel. In these cases, you’ll see the following message in the Reset root password section:
This Droplet’s root password is managed internally and cannot be changed from the control panel. Please SSH into the Droplet to manage it.
See How to Recover from Lost SSH Keys for additional steps you'll need to take.