Netlink
Netlink is a Linux kernel interface used for communication between kernel modules and user-space processes, enabling efficient data exchange and configuration of network subsystems. It provides a socket-based mechanism for sending and receiving messages, supporting both unicast and multicast communication, and is commonly used for tasks like routing table updates, network interface management, and firewall configuration.
Developers should learn Netlink when working on Linux networking applications, system administration tools, or kernel development, as it allows user-space programs to interact directly with the kernel's networking stack for real-time monitoring and control. It is essential for building network management utilities, implementing custom routing protocols, or developing security tools that require low-level access to network configurations, offering a more flexible and performant alternative to older interfaces like ioctl.