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In computing, booting is the process of starting a computer as initiated via hardware such as a physical button on the computer or by a software command. After it is switched on, a computer's central processing unit (CPU) has no software in its main memory, so some process must load
A bootloader, also spelled as boot loader [1] [2] or called bootstrap loader, is a computer program that is responsible for booting a computer. If it also provides an interactive menu with multiple boot choices then it's often called a boot manager .
Once all the boot and system drivers have been loaded, the kernel starts the session manager (smss.exe), which begins the login process. After the user has successfully logged into the machine, winlogon applies User and Computer Group Policy setting and runs startup programs declared in the Windows Registry and in "Startup" folders. [5]
Although the Linux booting process depends very much on the computer architecture, those architectures share similar stages and software components, [1] including system startup, bootloader execution, loading and startup of a Linux kernel image, and execution of various startup scripts and daemons. [2]
The boot ROMs of several Texas Instruments systems on a chip support configuring the peripherals through specific pins of the system on a chip. They have many ways to load the first stage bootloader (which is called MLO in the systems on a chip reference manuals): It can be loaded from various storage devices (MMC/SD/eMMC, NAND, etc.).
When interrupt 19h is called, the BIOS attempts to locate boot loader software on a "boot device", such as a hard disk, a floppy disk, CD, or DVD. It loads and executes the first boot software it finds, giving it control of the PC. [28] The BIOS uses the boot devices set in Nonvolatile BIOS memory , or, in the earliest PCs, DIP switches.
This category is for articles about booting, the process of starting a computer from scratch and loading an operating system. The term booting is a shortened form of term bootstrapping . Subcategories
Init is a daemon process that continues running until the system is shut down. It is the direct or indirect ancestor of all other processes and automatically adopts all orphaned processes. Init is started by the kernel during the booting process; a kernel panic will occur if