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A flow diagram of a computer booting. In computing, booting, also known as initial program load (IPL), is the process of starting a computer as initiated via hardware such as a physical button on the computer or by a software command.
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An initramfs-style boot is similar, but not identical to the described initrd boot. At this point, with interrupts enabled, the scheduler can take control of the overall management of the system, to provide pre-emptive multi-tasking, and the init process is left to continue booting the user environment in user space.
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]
A power-on self-test (POST) is a process performed by firmware or software routines immediately after a computer or other digital electronic device is powered on. [ 1 ] POST processes may set the initial state of the device from firmware and detect if any hardware components are non-functional.
In computer systems a loader is the part of an operating system that is responsible for loading programs and libraries.It is one of the essential stages in the process of starting a program, as it places programs into memory and prepares them for execution.
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Boot screen of Ubuntu Karmic Koala v9.10. A bootsplash, also known as a bootscreen, is a graphical representation of the boot process of the operating system.. A bootsplash can be a simple visualization of the scrolling boot messages in the console, but it can also present graphics or some combinations of both.