In computing Computing is usually defined as the activity of using and developing computer technology, computer hardware and software. It is the computer-specific part of information technology. Computer science is the study and the science of the theoretical foundations of information and computation and their implementation and application in computer, the 'kernel' is the central component of most computer operating systems An Operating System is an interface between hardware and user which is responsible for the management and coordination of activities and the sharing of the resources of the computer that acts as a host for computing applications run on the machine. As a host, one of the purposes of an operating system is to handle the details of the operation of. Its responsibilities include managing the system's resources (the communication between hardware A personal computer is made up of multiple physical components of computer hardware, upon which can be installed an operating system and a multitude of software to perform the operator's desired functions and software Computer software, or just software is a general term used to describe the role that computer programs, procedures and documentation play in a computer system components).[1] Usually as a basic component of an operating system, a kernel can provide the lowest-level abstraction layer An abstraction layer is a way of hiding the implementation details of a particular set of functionality. Software models that use layers of abstraction include the OSI 7 Layer model for computer network protocols, the OpenGL graphics drawing library, and the byte stream input/output (I/O) model originated by Unix and adopted by MSDOS, Linux, and for the resources (especially memory Random-access memory is a form of computer data storage. Today, it takes the form of integrated circuits that allow stored data to be accessed in any order (i.e., at random). The word random thus refers to the fact that any piece of data can be returned in a constant time, regardless of its physical location and whether or not it is related to the, processors A Central Processing Unit or processor is an electronic circuit that can execute computer programs, which are actually sets of instructions. This term has been in use in the computer industry at least since the early 1960s (Weik 2007). The form, design and implementation of CPUs have changed dramatically since the earliest examples, but their and I/O devices In computing, input/output, or I/O, refers to the communication between an information processing system , and the outside world – possibly a human, or another information processing system. Inputs are the signals or data received by the system, and outputs are the signals or data sent from it. The term can also be used as part of an action; to &) that application software must control to perform its function. It typically makes these facilities available to application Application software is a computer program that functions and is operated by means of a computer, with the purpose of supporting or improving the software user's work. In other words, it is the subclass of computer software that employs the capabilities of a computer directly and thoroughly to a task that the user wishes to perform. This should be processes In computing, a process is an instance of a computer program, consisting of one or more threads, that is being sequentially executed by a computer system that has the ability to run several computer programs concurrently through inter-process communication Inter-process communication is a set of techniques for the exchange of data among multiple threads in one or more processes. Processes may be running on one or more computers connected by a network. IPC techniques are divided into methods for message passing, synchronization, shared memory, and remote procedure calls (RPC). The method of IPC used mechanisms and system calls In computing, a system call is the mechanism used by an application program to request service from the operating system based on the monolithic kernel or to system servers on operating systems based on the microkernel-structure.
Operating System tasks are done differently by different kernels, depending on their design and implementation. While monolithic kernels A monolithic kernel is a kernel architecture where the entire operating system is working in the kernel space and alone as supervisor mode. In difference with other architectures, the monolithic kernel defines alone a high-level virtual interface over computer hardware, with a set of primitives or system calls to implement all operating system will try to achieve these goals by executing all the operating system code in the same address space In computing, an address space defines a range of discrete addresses, each of which may correspond to a physical or virtual memory register, a network host, peripheral device, disk sector or other logical or physical entity. The Internet Assigned Numbers Authority allocates ranges of numbers to various registries in order to enable them to each to increase the performance of the system, microkernels In computer science, a microkernel is a computer kernel that provides the mechanisms needed to implement an operating system, such as low-level address space management, thread management, and inter-process communication. If the hardware provides multiple privilege levels, then the microkernel is the only software executing at the most privileged run most of the operating system services in user space A conventional operating system usually segregates virtual memory into kernel space and user space. Kernel space is strictly reserved for running the kernel, kernel extensions, and some device drivers. In contrast, user space is the memory area where all user mode applications work and this memory can be swapped out when necessary. The term as servers, aiming to improve maintainability and modularity of the operating system.[2] A range of possibilities exists between these two extremes.
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nella cartella linux Entriamo nella cartella usr src linux ed avviamo la configurazione con make menuconfig La configurazione relativa al RAID 1 dovrebbe rispecchiare questa Ora lanciamo la sequenza di comandi make dep make clean make bzlilo make modules make modules install lilo ed il nuovo kernel dovrebbe essere pronto Riavviamo il computer giusto
Q. In Computer Science, we have what is meant by the term kernel and shell as found in the operating system. What are some of the differences in the these two terms.
Asked by agyemanwhettey - Tue Nov 6 11:07:21 2007 - - 1 Answers - 0 Comments
A. The kernal is the part of the OS that interacts with the hardware, the shell is the GUI or interface to the kernal. for more info:
Answered by castleon - Tue Nov 6 11:12:14 2007
