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  2. Booting process of Linux - Wikipedia

    en.wikipedia.org/wiki/Booting_process_of_Linux

    The startup function startup_32() for the kernel (also called the swapper or process 0) establishes memory management (paging tables and memory paging), detects the type of CPU and any additional functionality such as floating point capabilities, and then switches to non-architecture specific Linux kernel functionality via a call to start ...

  3. systemd - Wikipedia

    en.wikipedia.org/wiki/Systemd

    systemd is the first daemon to start during booting and the last daemon to terminate during shutdown. The systemd daemon serves as the root of the user space's process tree; the first process (PID 1) has a special role on Unix systems, as it replaces the parent of a process when the original parent terminates. Therefore, the first process is ...

  4. Booting - Wikipedia

    en.wikipedia.org/wiki/Booting

    When debugging a concurrent and distributed system of systems, a bootloop (also called boot loop or boot-loop) is a diagnostic condition of an § erroneous state that occurs on computing devices; when those devices repeatedly fail to complete the booting process and restart before a boot sequence is finished, a restart might prevent a user from ...

  5. Initial ramdisk - Wikipedia

    en.wikipedia.org/wiki/Initial_ramdisk

    In Linux systems, initrd (initial ramdisk) is a scheme for loading a temporary root file system into memory, to be used as part of the Linux startup process. initrd and initramfs (from INITial RAM File System) refer to two different methods of achieving this. Both are commonly used to make preparations before the real root file system can be ...

  6. System partition and boot partition - Wikipedia

    en.wikipedia.org/wiki/System_partition_and_boot...

    The boot partition is a primary partition that contains the boot loader, a piece of software responsible for booting the operating system. For example, in the standard Linux directory layout ( Filesystem Hierarchy Standard ), boot files (such as the kernel , initrd , and boot loader GRUB ) are mounted at /boot/ . [ 1 ]

  7. init - Wikipedia

    en.wikipedia.org/wiki/Init

    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

  8. Runlevel - Wikipedia

    en.wikipedia.org/wiki/Runlevel

    After the Linux kernel has booted, the /sbin/init program reads the /etc/inittab file to determine the behavior for each runlevel. Unless the user specifies another value as a kernel boot parameter, the system will attempt to enter (start) the default runlevel.

  9. Boot ROM - Wikipedia

    en.wikipedia.org/wiki/Boot_ROM

    When a system on a chip (SoC) enters suspend to RAM mode, in many cases, the processor is completely off while the RAM is put in self refresh mode. At resume, the boot ROM is executed again and many boot ROMs are able to detect that the SoC was in suspend to RAM and can resume by jumping directly to the kernel which then takes care of powering on again the peripherals which were off and ...