From the course: Linux Troubleshooting at the Command Line

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The Linux boot process: MBR

The Linux boot process: MBR - Linux Tutorial

From the course: Linux Troubleshooting at the Command Line

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The Linux boot process: MBR

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- [Instructor] In this section, we cover the Linux boot process. We will be covering the Master Boot Record, also known as Legacy Boot. In the depiction, we have the MBR-style boot. Just a quick note, the MBR has a limitation of four primary partitions and can have extended partitions. It works with older BIOS systems. Maximum disk size is two terabytes. This is because MBR uses a 32-bit addressing system. When the power button is pressed, the power supply delivers the required power to the motherboard and its components. When the system powers on, the BIOS runs from non-volatile memory. Its primary role is to initialize hardware and perform a power-on self-test to ensure hardware integrity. A quick note is the BIOS setting is retained by the CMOS that is powered by a small battery, allowing it to retain settings, even when the system is turned off. After reading the settings from the CMOs, the BIOS initializes the hardware. It ensures all necessary peripherals are operational. The…

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