Difference between revisions of "Initrd"
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imported>ThorstenStaerk |
imported>ThorstenStaerk |
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| − | This is how you modify an initrd: | + | The [[Linux boot process]] will first mount an initial [[ramdisk]] to mount the [[harddisk]]s. This is how you modify an initrd: |
mkdir tmp | mkdir tmp | ||
cd tmp | cd tmp | ||
| − | cp | + | cp /boot/initrd initrd.gz |
gunzip initrd.gz | gunzip initrd.gz | ||
mkdir tmp2 | mkdir tmp2 | ||
| Line 9: | Line 9: | ||
[http://linux.die.net/man/1/cpio cpio] -id < ../initrd | [http://linux.die.net/man/1/cpio cpio] -id < ../initrd | ||
Do the needed changes now in this folder. Then pack the initrd again: | Do the needed changes now in this folder. Then pack the initrd again: | ||
| − | + | /tmp/tmp2 # find . | cpio --create --format='newc' > ../newinitrd | |
| − | cd .. | + | 40242 blocks |
| − | + | /tmp/tmp2 # cd .. | |
| + | /tmp # gzip newinitrd | ||
Your new [[initrd]] is now called newinitrd.gz. | Your new [[initrd]] is now called newinitrd.gz. | ||
= See also = | = See also = | ||
* [[pXe]] | * [[pXe]] | ||
| + | * http://unix.stackexchange.com/questions/89923/how-does-linux-load-the-initrd-image | ||
Latest revision as of 11:26, 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
Your new initrd is now called newinitrd.gz.
