WebHost Manager, commonly known as WHM, is the powerful administrative control panel for web hosting servers. It is designed for server administrators and resellers to manage multiple cPanel accounts from a single, centralized interface. Unlike cPanel, which is intended for end-users to manage individual websites, WHM provides the tools to control the entire server environment.

With WHM, you can perform essential server management tasks, such as:

• Creating and suspending cPanel accounts for your clients or websites.
• Managing server security, including firewall configuration and monitoring.
• Installing and updating software, like PHP versions or server applications.
• Allocating server resources (disk space, bandwidth, email accounts) to different accounts.
• Monitoring server performance, bandwidth usage, and service statuses.

This tool is crucial for anyone responsible for a hosting server's health, security, and efficiency. It acts as the backend engine that makes managing numerous websites feasible and organized.

To start using WHM, you typically access it via your server's IP address or domain followed by :2087 (e.g., https://server-ip:2087). You will log in with your server's root credentials. Once inside, the interface is divided into logical sections like Account Functions, Server Configuration, and Security Center. For beginners, it's recommended to focus on creating your first cPanel account and exploring the Basic WebHost Manager® Setup wizard, which guides you through initial server configuration.

Remember, WHM grants extensive control over your server. Always proceed with caution, especially when modifying security settings or allocating resources, as incorrect changes can affect all hosted websites. For most day-to-day website management (like uploading files or creating email addresses), you will use the individual cPanel assigned to each account, not WHM directly.

In summary, WHM is the indispensable command center for web hosting professionals, enabling efficient, large-scale server and client account management.