initramfs.conf(5) [linux man page]
INITRAMFS.CONF(5) initramfs.conf manual INITRAMFS.CONF(5) NAME
initramfs.conf - configuration file for mkinitramfs DESCRIPTION
The behaviour of mkinitramfs can be modified by its configuration file. Each line in the file can be a configuration variable, a blank line, or a comment. The value of an variable is assigned by an statement of the form: name=[value] Configuration options can be broken out into configuration snippets and placed in individual files in the /etc/mkinitramfs/conf.d direc- tory. Files in this directory are always read after the main configuration file, so you can override the settings in the main config file without editing it directly. GENERAL VARIABLES
MODULES Specifies the modules for the initramfs image. Modules listed in /etc/initramfs-tools/modules and /usr/share/initramfs-tools/modules.d/* are always included in the initramfs, and are loaded early in the boot process. list doesn't load any additional modules at boot time, other than those listed in the above files. most adds most file system, all ata, sata, scsi and usb drivers. dep tries to guess which modules are necessary for the running box and only adds those modules. netboot adds the base and network modules, but skips block devices. The default setting is most. BUSYBOX Include busybox utilities for the boot scripts. If set to 'n' mkinitramfs will build an initramfs without busybox. Beware that many boot scripts need busybox utilities. COMPRESS Specifies the compression method used for the initramfs image. mkinitramfs will default to gzip if the kernel lacks support (CON- FIG_RD) or the corresponding userspace utility is not present. UMASK Set the umask value of the generated initramfs file. Useful to not disclose eventual keys. COMPCACHE_SIZE Amount of RAM to use for RAM-based compressed swap space. The default is not to use compcache. An empty value - compcache isn't used, or added to the initramfs at all. An integer and K (e.g. 65536 K) - use a number of kilobytes. An integer and M (e.g. 256 M) - use a number of megabytes. An integer and G (e.g. 1 G) - use a number of gigabytes. An integer and % (e.g. 50 %) - use a percentage of the amount of RAM. You can optionally install the compcache package to configure this setting via debconf and have userspace scripts to load and unload compcache. NFS VARIABLES
BOOT Allows one to use an nfs drive as the root of the drive. The default is to boot from local media (hard drive, USB stick). Set to nfs for an NFS root share. DEVICE Specifies the network interface, like eth0. ROOT Allows optional root bootarg hardcoding, when no root bootarg can be passed. A root bootarg overrides that special setting. NFSROOT Defaults to auto in order to pick up value from DHCP server. Otherwise you need to specify HOST:MOUNT. FILES
/etc/initramfs-tools/initramfs.conf AUTHOR
The initramfs-tools are written by Maximilian Attems <maks@debian.org>, Jeff Bailey <jbailey@raspberryginger.com> and numerous others. Loosely based on mkinitrd.conf by Herbert Xu. SEE ALSO
initramfs-tools(8), mkinitramfs(8), update-initramfs(8). Linux 2010/11/22 INITRAMFS.CONF(5)
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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)