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man initrd
Citat:initrd - boot loader initialized RAM disk
DESCRIPTION
The special file /dev/initrd is a read-only block device. Device
/dev/initrd is a RAM disk that is initialized (e.g. loaded) by the boot
loader before the kernel is started. The kernel then can use the block
device /dev/initrd's contents for a two phased system boot-up.
In the first boot-up phase, the kernel starts up and mounts an initial
root file-system from the contents of /dev/initrd (e.g. RAM disk ini-
tialized by the boot loader). In the second phase, additional drivers
or other modules are loaded from the initial root device's contents.
After loading the additional modules, a new root file system (i.e. the
normal root file system) is mounted from a different device.
Ako ne razumes Engleski, pokusacu to da objasnim ovako:
Initrd je RAM disk... Obicno se koristi za ucitavanje drajvera pre montiranja root particije u slucaju da podrska za fajl sistem root particije nije ugradjena u kernel, vec kompajlirana kao modul. Ili za ucitavanje drajvera koji bi se obicno ucitali tek u kasnijim fazama boot procesa, a postoji potreba za njima i ranije (usb misevi i tastature, napr). Takodje se koristi i za postavljanje grafickog ekrana pri bootu (bootsplash).
A za menjanje, pogledaj:
man mkinitrd
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