The easiest way to reset your cloud server's root password is through your Hostman control panel.
You can also change the password directly in the server's settings when connected via SSH. Note that in this case the root password you can copy in the control panel will no longer work.
To reset the root password:
Click on the lock icon on the server's page.
In the popup window click Change password to confirm password reset.
The new password will be immediately available on the Dashboard.
You can also reset the password in the Access tab:
Click Change and then confirm resetting the password.