From 0a5eca6530eb4d0120981936058537c24a2f92ce Mon Sep 17 00:00:00 2001 From: Thomas Horsley Date: Sun, 30 Jul 2006 03:04:12 -0700 Subject: [PATCH] documentation: Documentation/initrd.txt I spent a long time the other day trying to examine an initrd image on a fedora core 5 system because the initrd.txt file is apparently obsolete. Here is a patch which I hope will reduce future confusion for others. Signed-off-by: Thomas Horsley Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Documentation/initrd.txt | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'Documentation/initrd.txt') diff --git a/Documentation/initrd.txt b/Documentation/initrd.txt index b1b6440237a..15f1b35deb3 100644 --- a/Documentation/initrd.txt +++ b/Documentation/initrd.txt @@ -72,6 +72,22 @@ initrd adds the following new options: initrd is mounted as root, and the normal boot procedure is followed, with the RAM disk still mounted as root. +Compressed cpio images +---------------------- + +Recent kernels have support for populating a ramdisk from a compressed cpio +archive, on such systems, the creation of a ramdisk image doesn't need to +involve special block devices or loopbacks, you merely create a directory on +disk with the desired initrd content, cd to that directory, and run (as an +example): + +find . | cpio --quiet -c -o | gzip -9 -n > /boot/imagefile.img + +Examining the contents of an existing image file is just as simple: + +mkdir /tmp/imagefile +cd /tmp/imagefile +gzip -cd /boot/imagefile.img | cpio -imd --quiet Installation ------------ -- cgit v1.2.3