update-initramfs(8) [linux man page]

UPDATE-INITRAMFS(8)					      update-initramfs manual					       UPDATE-INITRAMFS(8)

NAME

       update-initramfs - generate an initramfs image

SYNOPSIS

       update-initramfs -c|-d|-u [-k version] [-t] [-v] [-b] [-h]

DESCRIPTION

       The  update-initramfs  script manages your initramfs images on your local box.  It keeps track of the existing initramfs archives in /boot.
       There are three modes of operation create, update or delete.  You must at least specify one of those modes.

       The initramfs is a gzipped cpio archive.  At boot time, the kernel unpacks that archive into RAM disk, mounts and uses it as  initial  root
       file system. All finding of the root device happens in this early userspace.

OPTIONS

	-k  version
	      Set  the	specific  kernel  version for whom the initramfs will be generated.  For example the output of uname -r for your currently
	      running kernel.  This argument is optional for update. The default is the latest kernel version.

	      The use of "all" for the version string specifies update-initramfs to execute the chosen action for all kernel  versions,  that  are
	      already known to update-initramfs.

	-c    This mode creates a new initramfs.

	-u    This mode updates an existing initramfs.

	-d    This mode removes an existing initramfs.

	-t    Allows one to take over an custom initramfs with a newer one.

	-v    This option increases the amount of information you are given during the chosen action.

	-b    Set an different bootdir for the image creation.

	-h    Print a short help page describing the available options in update-initramfs.

EXAMPLES

       Update the initramfs of the newest kernel:

       update-initramfs -u

       Create the initramfs for a specific kernel:

       update-initramfs -c -k 2.6.18-1-686

FILES

       /etc/initramfs-tools/update-initramfs.conf

AUTHOR

       The initramfs-tools are written by Maximilian Attems <maks@debian.org>, Jeff Bailey <jbailey@raspberryginger.com> and numerous others.

SEE ALSO

	initramfs.conf(5), initramfs-tools(8), mkinitramfs(8).

Linux								    2008/12/19						       UPDATE-INITRAMFS(8)

DRACUT.CONF(5)							      dracut							    DRACUT.CONF(5)

NAME

       dracut.conf - configuration file(s) for dracut

SYNOPSIS

       /etc/dracut.conf /etc/dracut.conf.d/*.conf

DESCRIPTION

       dracut.conf is loaded during the initialisation phase of dracut. Command line parameter will overwrite any values set here.
       dracut.conf.d/*.conf files are read in alphanumerical order and will overwrite parameters set in /etc/dracut.conf. Each line specifies an
       attribute and a value. A # indicates the beginning of a comment; following characters, up to the end of the line are not interpreted.

       dracutmodules+=" <dracut modules> "
	   Specify a space-separated list of dracut modules to call when building the initramfs. Modules are located in /usr/lib/dracut/modules.d.

       omit_dracutmodules+=" <dracut modules> "
	   Omit a space-separated list of dracut modules.

       add_dracutmodules+=" <dracut modules> "
	   Add a space-separated list of dracut modules.

       drivers+=" <kernel modules> "
	   Specify a space-separated list of kernel modules to exclusively include in the initramfs. The kernel modules have to be specified
	   without the ".ko" suffix.

       add_drivers+=" <kernel modules> "
	   Specify a space-separated list of kernel modules to add to the initramfs. The kernel modules have to be specified without the ".ko"
	   suffix.

       omit_drivers+=" <kernel modules> "
	   Specify a space-separated list of kernel modules not to add to the initramfs. The kernel modules have to be specified without the ".ko"
	   suffix.

       install_items+=" <kernel modules> "
	   Specify a space-separated list of files, which are added to the initramfs image.

       filesystems+=" <filesystem names> "
	   Specify a space-separated list of kernel filesystem modules to exclusively include in the generic initramfs.

       drivers_dir="<kernel modules directory>"
	   Specify the directory, where to look for kernel modules

       fw_dir+=" :<dir>[:<dir> ...] "
	   Specify additional directories, where to look for firmwares, separated by :

       install_items+=" <file>[ <file> ...] "
	   Specify additional files to include in the initramfs, separated by spaces.

       do_strip="{yes|no}"
	   Strip binaries in the initramfs (default=yes)

       hostonly="{yes|no}"
	   Host-Only mode: Install only what is needed for booting the local host instead of a generic host and generate host-specific
	   configuration.

       tmpdir="<temporary directory>"
	   Specify temporary directory to use.

	   Warning
	   If chrooted to another root other than the real root device, use --fstab and provide a valid /etc/fstab.

       use_fstab="{yes|no}"
	   Use /etc/fstab instead of /proc/self/mountinfo.

       add_fstab+=" <filename> "
	   Add entries of <filename> to the initramfs /etc/fstab.

       mdadmconf="{yes|no}"
	   Include local /etc/mdadm.conf (default=yes)

       lvmconf="{yes|no}"
	   Include local /etc/lvm/lvm.conf (default=yes)

       fscks=" <fsck tools> "
	   Add a space-separated list of fsck tools. If nothing is specified, the default is: "umount mount /sbin/fsck* xfs_db xfs_check
	   xfs_repair e2fsck jfs_fsck reiserfsck btrfsck". The installation is opportunistic (non-existing tools are ignored).

       nofscks="{yes|no}"
	   If specified, inhibit installation of any fsck tools.

       kernel_only="{yes|no}"
	   Only install kernel drivers and firmware files. (default=no)

       no_kernel="{yes|no}"
	   Do not install kernel drivers and firmware files (default=no)

       stdloglvl="{0-6}"
	   Set logging to standard error level.

       sysloglvl="{0-6}"
	   Set logging to syslog level.

       fileloglvl="{0-6}"
	   Set logging to file level.

       logfile="<file>"
	   Path to log file.

       show_modules="{yes|no}"
	   Print included module's name to standard output during build.

FILES

       /etc/dracut.conf
	   Old configuration file. You better use your own file in /etc/dracut/conf.d/.

       /etc/dracut/conf.d/
	   Any /etc/dracut/conf.d/*.conf file can overwrite the values in /etc/dracut.conf. The configuration files are read in alphanumerical
	   order.

AUTHOR

       Harald Hoyer

SEE ALSO

       dracut(8) dracut.cmdline(7)

dracut								    11/08/2012							    DRACUT.CONF(5)