Kernel

The kernel is the core component of an operating system (OS), acting as the primary interface between the system's hardware and the software applications running on it. It manages the system's resources, including the CPU, memory, and I/O devices, and provides essential services such as [process management](/ja/terms/process-management), memory management, and device management. When a user application needs to access hardware resources, it makes a system call to the kernel. The kernel then translates this request into instructions that the hardware can understand and execute. It also handles task scheduling, deciding which processes get to use the CPU and for how long, and manages memory allocation, ensuring that processes have the memory they need without interfering with each other. Furthermore, the kernel is responsible for inter-process communication (IPC), allowing different applications to exchange data and synchronize their operations. Its modular design often allows for dynamic loading and unloading of modules, such as device drivers, which can be added or removed without rebooting the system. The kernel's primary goal is to provide a stable and efficient environment for applications to run while abstracting away the complexities of the underlying hardware.