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The second-stage loader (stage2, the /boot/grub/ files) is loaded by the stage1.5 and displays the GRUB startup menu that allows the user to choose an operating system or examine and edit startup parameters. After a menu entry is chosen and optional parameters are given, GRUB loads the linux kernel into memory and passes control to it.
This is an operating system in which the time taken to process an input stimulus is less than the ... same as Linux: RT-Thread: Apache 2.0: open source: embedded ...
Operating system selection at boot time consequently depends on the bootloader configured within the primary partition that has the boot or "active" flag set on its partition table entry, which could be a bootloader of DOS, OS/2, eComStation, ArcaOS [4] or BSD, in addition to Linux or Windows.
Ubuntu (/ ʊ ˈ b ʊ n t uː / ⓘ uu-BUUN-too) [9] is a Linux distribution derived from Debian and composed mostly of free and open-source software. [10] [11] [12] Ubuntu is officially released in multiple editions: Desktop, [13] Server, [14] and Core [15] for Internet of things devices [16] and robots.
GalliumOS was based on Xubuntu and maintained compatibility with the Ubuntu repositories. [1] Multiple sources indicate that Gallium's boot time was faster than other Linux distributions made for ChromeOS. It was optimized to limit stalls and had integrated touchpad drivers. [2] [3] GalliumOS was compatible with some ChromeOS devices.
Other Linux distributions (such as Fedora and Ubuntu) generate a more generic initrd image. These start only with the device name of the root file system (or its UUID) and must discover everything else at boot time. In this case, the software must perform a complex cascade of tasks to get the root file system mounted:
Software that requires real-time input - Since all input at a thin client is sent over the network before it is registered by the operating system, there can be substantial delay. This is a major problem in software that requires real-time input (i.e. video games). Diskless nodes run the software locally, and as such, do not have this problem.
Linux kernel — monolithic Unix-like computer operating system kernel. The Linux operating system is based on this kernel and deployed on both traditional computer systems such as personal computers and servers, usually in the form of Linux distributions (including Ubuntu and its derivatives), and on various embedded devices such as routers ...
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