Packing and unpacking initrd: Difference between revisions
From Leo's Notes
This page was last edited on 1 September 2019, at 04:50.
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Revision as of 04:50, 1 September 2019
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.