📌 Linux Components and Subsystem
-
Hardware Controllers : This Subsystem is comprised of all the possible physical devices in a linux installation - CPU , Memory Hardware , Hard Disks
-
Linux kernel : The kernel abstracts and mediates access to the hardware resources , including the CPU a kernel is core of operating system
-
O/S Servives : These are services that are typically considered part of the operating system (e.g. windowing sysem , command shell )
-
User Applications: The set of applications in use on a particular linux sysem (eg web browser)
Linux Kernel Subsystem
-
Process Scheduler (SCHED) : To provide control , fair access of CPU to process , while interacting with HW on time
-
Memory Manager (MM) : To access system memory , securely and efficiently by multiple processes. Supports Virtual Memory in case of huge memory requirement
-
Virtual File System (VFS): Abstracts the details of the variety of hardware devices by presenting a common file interface to all devices
-
Network Interface (NET): Provides access to several networking standards and a variety of network hardware
-
Inter Process Commmunication (IPC) : Supports Several Mechanisms for Process-to-Process Communication on a Single Linux System