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Old 08-20-2017, 12:35 PM   #1
linux003
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Grub.conf in Linux Boot Process


Hi,

Cent OS 5.0 is having below Six steps of Linux boot process.

1) BIOS
2) MBR
3) GRUB
4) Kernel
5) Init
6) Run level

Grub.conf file execution is happening at 3'rd step. File location is /boot/grub/grub.conf file. But whole root file system mount happens at Kernel(4'th step). How does Grub.conf file execution happen without root file system? Because all files are in "/" folder.

Regards
Satheesh
 
Old 08-20-2017, 08:00 PM   #2
syg00
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2.5) grub stage 1.5
3.5) initrd

Thee are lots of simplifications in your analysis. For example grub.conf is read, not executed.

Last edited by syg00; 08-20-2017 at 08:04 PM.
 
Old 08-20-2017, 08:14 PM   #3
michaelk
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Because grub can directly read linux filesystem
https://www.ibm.com/developerworks/l...oot/index.html
 
  


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