Packing and unpacking initrd: Difference between revisions
From Leo's Notes
This page was last edited on 29 March 2015, at 06:03.
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You may want to run <code>file /path/to/initrd.img</code> in order to determine the exact method of compression. The above commands above assumes <code>cpio + gzip</code>. | You may want to run <code>file /path/to/initrd.img</code> in order to determine the exact method of compression. The above commands above assumes <code>cpio + gzip</code>. | ||
[[Category:Linux]] | [[Category:Linux]] | ||
{{Navbox Linux}} | |||
Revision as of 06:03, 29 March 2015
modify initird.img or other similar images
To extract initird.img:
# Go to an empty directory before extracting the image.
mkdir -p /mnt/initrd_extract && cd /mnt/initrd_extract
gzip -dc < /path/to/initrd.img | cpio -i
To pack files back into initrd.img
# Go to the directory containing the contents of the image.
cd /mnt/initrd_extract
find . | cpio -o -c | gzip -9 > /path/to/initrd.img
You may want to run file /path/to/initrd.img in order to determine the exact method of compression. The above commands above assumes cpio + gzip.