Linux booting process
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The Linux booting process begins with the BIOS performing basic checks before activating the MBR, which then loads the boot loader GRUB. GRUB executes the Linux kernel, which loads the root file system, init, device drivers, and runlevels to start Linux in single-user, multi-user, or graphical mode.
Linux booting process
- 2. BIOS http://www.nadguli.in/linux-booting-process/ BASIC INPUT OUT PUT SYSTEM PERFORMS BASIC SYSTEM INTEGRITY TEST ALSO CALLED AS POST (POWER ON SELF RTEST) ACTIVATES MBR
- 3. MBR http://www.nadguli.in/linux-booting-process/ MASTER BOOT RECORD LOCATED AT FIRST SECTOR OF THE BOOTABLE DEVICE ACTIVATES GRUB OR BOOT LOADER
- 4. GRUB http://www.nadguli.in/linux-booting-process/ GRAND UNIFIED BOOT LOADER EXECUTES KERNEL
- 5. KERNEL http://www.nadguli.in/linux-booting-process/ CORE OF LINUX SYSTEM LOADS ROOT FILE SYSTEM, INIT AND ALL DEVICE DRIVERS
- 6. INIT INITIATE THE RUNLEVEL REFFERING TO THE /ETC/INITTAB http://www.nadguli.in/linux-booting-process/
- 7. RUNLEVEL NOTHING 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 http://www.nadguli.in/linux-booting-process/
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