DRACUT-CATIMAGES(8) dracut DRACUT-CATIMAGES(8)NAME
dracut-catimages - creates initial ramdisk image by concatenating images
SYNOPSIS
dracut-catimages [OPTION...] <initramfs base image> [<image>...]
DESCRIPTION
dracut-catimages creates an initial ramdisk image by concatenating several images from the command line and /boot/dracut/*.img
OPTIONS -f, --force
overwrite existing initramfs file.
-i, --imagedir
Directory with additional images to add (default: /boot/dracut/)
-o, --overlaydir
Overlay directory, which contains additional files that will be used to create an additional image
--nooverlay
Do not use the overlay directory
--noimagedir
Do not use the additional image directory
-h, --help
display help text and exit.
--debug
output debug information of the build process
-v, --verbose
verbose output during the build process
FILES
/boot/dracut/*.img
images to work with
AUTHORS
Harald Hoyer
AVAILABILITY
The dracut-catimages command is part of the dracut package and is available from https://dracut.wiki.kernel.org
SEE ALSO dracut(8)dracut 09/12/2013 DRACUT-CATIMAGES(8)
Check Out this Related Man Page
DRACUT-SHUTDOWN.S(8) dracut DRACUT-SHUTDOWN.S(8)NAME
dracut-shutdown.service - unpack the initramfs to /run/initramfs
SYNOPSIS
dracut-shutdown.service
DESCRIPTION
This service unpacks the initramfs image to /run/initramfs. systemd pivots into /run/initramfs at shutdown, so the root filesytem can be
safely unmounted.
The following steps are executed during a shutdown:
o systemd switches to the shutdown.target
o systemd starts /lib/systemd/system/shutdown.target.wants/dracut-shutdown.service
o dracut-shutdown.service executes /usr/lib/dracut/dracut-initramfs-restore which unpacks the initramfs to /run/initramfs
o systemd finishes shutdown.target
o systemd kills all processes
o systemd tries to unmount everything and mounts the remaining read-only
o systemd checks, if there is a /run/initramfs/shutdown executable
o if yes, it does a pivot_root to /run/initramfs and executes ./shutdown. The old root is then mounted on /oldroot.
/usr/lib/dracut/modules.d/99shutdown/shutdown.sh is the shutdown executable.
o shutdown will try to umount every /oldroot mount and calls the various shutdown hooks from the dracut modules
This ensures, that all devices are disassembled and unmounted cleanly.
To debug the shutdown process, you can get a shell in the shutdown procedure by injecting "rd.break=pre-shutdown rd.shell" or
"rd.break=shutdown rd.shell".
# mkdir -p /run/initramfs/etc/cmdline.d
# echo "rd.break=pre-shutdown rd.shell" > /run/initramfs/etc/cmdline.d/debug.conf
# touch /run/initramfs/.need_shutdown
AUTHORS
Harald Hoyer
SEE ALSO dracut(8)dracut 09/12/2013 DRACUT-SHUTDOWN.S(8)
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hello
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