Difference between revisions of "cpio notes"

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m (Created page with 'Category: Engineering == Create a cpio archive == Note that '''archive''' should be outside of the directory tree that is being archived. <pre> find . | cpio -o > ../archiv…')
 
m (Extract a Linux kernel)
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<pre>
 
<pre>
 
gunzip --to-stdout /boot/initrd.img-2.6.31-22-server | cpio -i -d -H newc --no-absolute-filenames
 
gunzip --to-stdout /boot/initrd.img-2.6.31-22-server | cpio -i -d -H newc --no-absolute-filenames
 +
</pre>
 +
 +
Also, often see this; although, this does not have '''newc''' or no absolute filename support. Not sure why this is still used.
 +
<pre>
 +
cpio -id < initrd
 
</pre>
 
</pre>

Revision as of 18:14, 26 February 2014


Create a cpio archive

Note that archive should be outside of the directory tree that is being archived.

find . | cpio -o > ../archive

Create a Linux kernel initrd

An initramfs is a root filesystem embedded into the Linux kernel. It is the successor of initrd.

IMPORTANT: Do not use the '-depth' option with `find`!

find . | cpio -o -H newc | gzip > ../initrd.cpio.gz

List the contents of initrd

gunzip --to-stdout /boot/initrd.img-2.6.31-22-server | cpio -t

Extract a Linux kernel

gunzip --to-stdout /boot/initrd.img-2.6.31-22-server | cpio -i -d -H newc --no-absolute-filenames

Also, often see this; although, this does not have newc or no absolute filename support. Not sure why this is still used.

cpio -id < initrd