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FEBOOTSTRAP-TO-INITRAMFS(8) Virtualization Support FEBOOTSTRAP-TO-INITRAMFS(8)

NAME
       febootstrap-to-initramfs - Convert febootstrap root to initramfs (cpio)
       file.

SYNOPSIS
	febootstrap-to-initramfs [--files=filelist] DIR > initrd.img

DESCRIPTION
       febootstrap-to-initramfs converts the filesystem created by
       febootstrap(8) into an initramfs image.	This allows the new system to
       be booted on real hardware or inside a QEMU-based virtual machine.

       An initramfs image is just a compressed cpio file, so you could
       uncompress it with gunzip(1) and use cpio(1) to convert it into other
       formats.

       The permissions inside the initrd image are corrected automatically
       (see the discussion of fakeroot logfile in the febootstrap(8) page).
       You do not need to run this command as root.

OPTIONS
       --files=filelist
	   "filelist" should be a file containing a list of the files to be
	   added to the initramfs (one per line).  Only those files are added
	   and any others are ignored.

	   When the "--files" option is not given, all files in "DIR" are
	   added to the initramfs image.

       --nocompress
	   This prevents the initramfs image from being compressed.

	   Linux can boot from uncompressed initramfs images (in fact,
	   faster), but they take up a lot more space on disk.

/init
       Normal initramfs images start by executing the program or script called
       "/init".	 febootstrap does not create this script, so you may wish to,
       particularly for very minimal bootstraps that don't have the normal
       SysVinit/upstart machinery.  It's also required if the kernel cannot
       find a "real" root filesystem (the root filesystem that we built and
       placed in an initramfs doesn't count).

       Linux will try to run the following commands in turn, unless you
       override it using the "init=cmd" kernel option:

       ·   /init

       ·   /sbin/init

       ·   /etc/init

       ·   /bin/init

       ·   /bin/sh

MEMORY REQUIREMENTS
       Initramfs images are uncompressed by the kernel into memory.  When
       booting the new system you will need at least enough free RAM to store
       the uncompressed filesystem plus extra to run any programs.  Bear this
       in mind when creating very large filesystems.

SEE ALSO
       febootstrap(8), cpio(1).

AUTHORS
       Richard W.M. Jones <rjones @ redhat . com>

COPYRIGHT
       (C) Copyright 2009 Red Hat Inc.,
       <http://people.redhat.com/~rjones/febootstrap>.

       This program is free software; you can redistribute it and/or modify it
       under the terms of the GNU General Public License as published by the
       Free Software Foundation; either version 2 of the License, or (at your
       option) any later version.

       This program is distributed in the hope that it will be useful, but
       WITHOUT ANY WARRANTY; without even the implied warranty of
       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
       General Public License for more details.

       You should have received a copy of the GNU General Public License along
       with this program; if not, write to the Free Software Foundation, Inc.,
       675 Mass Ave, Cambridge, MA 02139, USA.

febootstrap-2.9			  2010-09-17	   FEBOOTSTRAP-TO-INITRAMFS(8)
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