Difference between pages "FlAsh" and "Initrd"
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(Difference between pages)
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− | # | + | The [[Linux boot process]] will first mount an initial [[ramdisk]] to mount the [[harddisk]]s. This is how you modify an initrd: |
+ | |||
+ | mkdir tmp | ||
+ | cd tmp | ||
+ | cp /boot/initrd initrd.gz | ||
+ | gunzip initrd.gz | ||
+ | mkdir tmp2 | ||
+ | cd tmp2 | ||
+ | [http://linux.die.net/man/1/cpio cpio] -id < ../initrd | ||
+ | Do the needed changes now in this folder. Then pack the initrd again: | ||
+ | /tmp/tmp2 # find . | cpio --create --format='newc' > ../newinitrd | ||
+ | 40242 blocks | ||
+ | /tmp/tmp2 # cd .. | ||
+ | /tmp # gzip newinitrd [[find]] . | cpio --create --format='newc' > ../newinitrd | ||
+ | Your new [[initrd]] is now called newinitrd.gz. | ||
+ | |||
+ | = See also = | ||
+ | * [[pXe]] | ||
+ | * http://unix.stackexchange.com/questions/89923/how-does-linux-load-the-initrd-image |
Revision as of 11:24, 20 August 2014
The Linux boot process will first mount an initial ramdisk to mount the harddisks. This is how you modify an initrd:
mkdir tmp cd tmp cp /boot/initrd initrd.gz gunzip initrd.gz mkdir tmp2 cd tmp2 cpio -id < ../initrd
Do the needed changes now in this folder. Then pack the initrd again:
/tmp/tmp2 # find . | cpio --create --format='newc' > ../newinitrd 40242 blocks /tmp/tmp2 # cd .. /tmp # gzip newinitrd find . | cpio --create --format='newc' > ../newinitrd
Your new initrd is now called newinitrd.gz.