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An unlocked bootloader, showing additional available options. Bootloader unlocking is the process of disabling the bootloader security that makes secure boot possible. It can make advanced customizations possible, such as installing custom firmware.
To set up a live USB system for commodity PC hardware, the following steps must be taken: A USB flash drive needs to be connected to the system, and be detected by it; One or more partitions may need to be created on the USB flash drive; The "bootable" flag must be set on the primary partition on the USB flash drive
It contains init, which is executed. The Android kernel is a modified version of the Linux kernel. Init does mount the partitions. dm-verity verifies the integrity of the partitions that are specified in the fstab file. dm-verity is a Linux kernel module that was introduced by Google in Android since version 4.4.
The Google Nexus and Pixel line of devices can have their bootloader unlocked by simply connecting the device to a computer while in bootloader mode and running the Fastboot protocol with the command fastboot oem unlock on older devices, [50] or fastboot flashing unlock on newer devices. [51]
A modern PC is configured to attempt to boot from various devices in a certain order. If a computer is not booting from the device desired, such as the floppy drive, the user may have to enter the BIOS Setup function by pressing a special key when the computer is first turned on (such as Delete, F1, F2, F10 or F12), and then changing the boot order. [6]
Once the Windows device drivers are installed, a special USB command is sent to the device to “switch” it to modem mode. [6] [unreliable source] Ozerocdoff: It temporarily disables ZeroCD for USB Option WWAN modem. The new USB Option WWAN modem devices support a CD-ROM device, which holds the needed Windows device driver to use the WWAN modem.
Using a standardized interface and protocol allows systems-management software based on IPMI to manage multiple, disparate servers. As a message-based, hardware-level interface specification, IPMI operates independently of the operating system (OS) to allow administrators to manage a system remotely in the absence of an operating system or of the system management software.
Instead, a computer may implement interrupts for I/O completion, avoiding the need for polling or busy waiting. [70] Some computers require an interrupt for each character or word, costing a significant amount of CPU time. Direct memory access (DMA) is an architecture feature to allow devices to bypass the CPU and access main memory directly. [71]