The control panel provided for your Linux reseller hosting is Web Host Manager (WHM)
WHM serves as a control dashboard that allows users to manage several cPanel-based sites.
In summary, WHM functions as a Reseller control panel, utilized by resellers to oversee all hosting accounts included in their reseller plans.
On the other hand, cPanel is the control panel used by end users associated with a hosting provider's reseller. It enables customers to manage their own hosting accounts.
You may refer here for more information on the WHM - Initial Setup Guide
You may refer here to access additional articles related to WHM