linux booting process
TRANSCRIPT
LINUX BOOTING PROCESS
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BIOS
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BASIC INPUT OUT PUT SYSTEM
PERFORMS BASIC SYSTEM INTEGRITY TEST
ALSO CALLED AS POST (POWER ON SELF RTEST)
ACTIVATES MBR
MBR
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MASTER BOOT RECORD
LOCATED AT FIRST SECTOR OF THE BOOTABLE DEVICE
ACTIVATES GRUB OR BOOT LOADER
GRUB
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GRAND UNIFIED BOOT LOADER
EXECUTES KERNEL
KERNEL
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CORE OF LINUX SYSTEM
LOADS ROOT FILE SYSTEM, INIT AND ALL DEVICE DRIVERS
INIT
INITIATE THE RUNLEVEL REFFERING TO THE /ETC/INITTAB
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RUNLEVELNOTHING BUT MODE OF OS TO BE BOOTED
0 - IS FOR HALT
1 – FOR SINGLE USER MODE
2 - MULTIUSER WITHOUT NETWORK
3 - MULTI USER WITH NETWORK
4- UNUSED
5 - X11 OR GRAPHICAL MODE
6 - REBOOT
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http://www.nadguli.in/linux-booting-process/
http://www.nadguli.in/linux-booting-process/