680 lines
25 KiB
XML
680 lines
25 KiB
XML
<?xml version='1.0' encoding='ISO-8859-1'?>
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd" []>
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<refentry>
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<refentryinfo>
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<title>dracut.kernel</title>
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<productname>dracut</productname>
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<authorgroup>
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<author>
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<contrib>Developer</contrib>
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<firstname>Harald</firstname>
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<surname>Hoyer</surname>
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<email>harald@redhat.com</email>
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</author>
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</authorgroup>
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</refentryinfo>
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<refmeta>
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<refentrytitle>dracut.kernel</refentrytitle>
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<manvolnum>7</manvolnum>
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<refmiscinfo class="version"/>
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</refmeta>
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<refnamediv>
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<refname>dracut.kernel</refname>
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<refpurpose>dracut kernel command line options</refpurpose>
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</refnamediv>
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<refsect1>
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<title>Description</title>
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<para>The root filesystem used by the kernel is specified in the boot configuration
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file, as always. The traditional <emphasis remap="B">root=/dev/hda1</emphasis> style device
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specification is allowed. If a label is used, as in <emphasis remap="B">root=LABEL=rootPart</emphasis>
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the initramfs will search all available devices for an ext2 or ext3 filesystem
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with the appropriate label, and mount that device as the root filesystem.
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<emphasis remap="B">root=UUID=uuidnumber</emphasis> will mount the partition with that UUID as the
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root filesystem.</para>
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<refsect2>
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<title>Standard</title>
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<variablelist>
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<varlistentry>
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<term>
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<envar>init=</envar>
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<replaceable><path to real init></replaceable>
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</term>
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<listitem>
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<para> </para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<envar>root=<replaceable><path to blockdevice></replaceable></envar>
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</term>
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<listitem>
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<para>specify blockdevice to use as root filesystem.
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e.g.
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root=/dev/sda1
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root=/dev/disk/by-path/pci-0000:00:1f.1-scsi-0:0:1:0-part1</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<envar>rootfstype=<replaceable><filesystem type></replaceable></envar>
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</term>
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<listitem>
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<para>"auto" if not specified, e.g. rootfstype=ext3</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<envar>rootflags=<replaceable><mount options></replaceable></envar>
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</term>
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<listitem>
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<para>specify additional mount options for the root filesystem. If not set, /etc/fstab
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of the real root will be parsed for special mount options and mounted
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accordingly.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<envar>rd_NO_FSTAB</envar>
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</term>
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<listitem>
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<para>do not honor special mount options for the root filesystem found in
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/etc/fstab of the real root.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect2>
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<refsect2>
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<title>Misc</title>
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<variablelist>
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<varlistentry>
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<term>
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<envar>rdblacklist=<replaceable><drivername></replaceable></envar>
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</term>
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<listitem>
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<para>do not load kernel module <drivername>
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This parameter can be specified multiple times.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<envar>rdloaddriver=<replaceable><drivername></replaceable></envar>
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</term>
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<listitem>
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<para>force loading kernel module <drivername>
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This parameter can be specified multiple times.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect2>
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<refsect2>
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<title>Debug</title>
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<variablelist>
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<varlistentry>
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<term>
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<envar>rdinfo</envar>
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</term>
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<listitem>
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<para>print informational output though "quiet" is set</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<envar>rdshell</envar>
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</term>
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<listitem>
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<para>allow dropping to a shell, if root mounting fails</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<envar>rdinitdebug</envar>
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</term>
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<listitem>
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<para>set -x for the dracut shell and logs to dmesg, console and /init.log</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<envar>rdbreak</envar>
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</term>
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<listitem>
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<para>drop to a shell at the end</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<envar>rdbreak=</envar>{cmdline|pre-udev|pre-trigger|initqueue|pre-mount|mount|pre-pivot}
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</term>
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<listitem>
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<para>drop to a shell on defined breakpoint</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<envar>rdudevinfo</envar>
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</term>
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<listitem>
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<para>set udev to loglevel info</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<envar>rdudevdebug</envar>
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</term>
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<listitem>
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<para>set udev to loglevel debug</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect2>
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<refsect2>
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<title>I18N</title>
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<para> e.g.
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LANG=en_US.UTF-8
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SYSFONT=latarcyrheb-sun16
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KEYTABLE=de-latin1-nodeadkeys</para>
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<variablelist>
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<varlistentry>
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<term>
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<envar>KEYBOARDTYPE=</envar>{sun|pc}
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</term>
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<listitem>
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<para>will be written to /etc/sysconfig/keyboard in the initramfs</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<envar>KEYTABLE=<replaceable><keytable filename></replaceable></envar>
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</term>
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<listitem>
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<para>will be written to /etc/sysconfig/keyboard in the initramfs</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><envar>SYSFONT=<replaceable class="option"><Console font></replaceable></envar></term>
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<listitem>
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<para>will be written to /etc/sysconfig/i18n in the initramfs</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><envar>SYSFONTACM=</envar>Console map</term>
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<listitem>
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<para>will be written to /etc/sysconfig/i18n in the initramfs</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<envar>UNIMAP=<replaceable class="parameter"><Unicode font map></replaceable></envar>
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</term>
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<listitem>
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<para>will be written to /etc/sysconfig/i18n in the initramfs</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<envar>LANG=<replaceable><locale></replaceable></envar>
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</term>
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<listitem>
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<para>will be written to /etc/sysconfig/i18n in the initramfs</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect2>
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<refsect2>
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<title>LVM</title>
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<variablelist>
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<varlistentry>
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<term>
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<envar>rd_NO_LVM</envar>
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</term>
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<listitem>
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<para>disable LVM detection</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<envar>rd_LVM_VG=<replaceable><volume group name></replaceable></envar>
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</term>
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<listitem>
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<para>only activate the volume groups with the given name
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rd_LVM_VG can be specified multiple times on the kernel command line.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<envar>rd_LVM_LV=<replaceable><logical volume name></replaceable></envar>
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</term>
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<listitem>
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<para>only activate the logical volumes with the given name
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rd_LVM_LV can be specified multiple times on the kernel command line.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<envar>rd_NO_LVMCONF</envar>
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</term>
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<listitem>
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<para>remove any /etc/lvm/lvm.conf, which may exist in the initramfs</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect2>
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<refsect2>
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<title>crypto LUKS</title>
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<variablelist>
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<varlistentry>
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<term>
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<envar>rd_NO_LUKS</envar>
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</term>
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<listitem>
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<para>disable crypto LUKS detection</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<envar>rd_LUKS_UUID=<replaceable><luks uuid></replaceable></envar>
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</term>
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<listitem>
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<para>only activate the LUKS partitions with the given UUID
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Any "luks-" of the LUKS UUID is removed before comparing to <luks uuid>.
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The comparisons also matches, if <luks uuid> is only the beginning of the
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LUKS UUID, so you don't have to specify the full UUID.
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This parameter can be specified multiple times.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<envar>rd_NO_CRYPTTAB</envar>
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</term>
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<listitem>
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<para>do not check, if LUKS partition is in /etc/crypttab</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect2>
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<refsect2>
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<title>MD</title>
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<variablelist>
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<varlistentry>
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<term>
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<envar>rd_NO_MD</envar>
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</term>
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<listitem>
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<para>disable MD RAID detection</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<envar>rd_NO_MDIMSM</envar>
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</term>
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<listitem>
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<para>no MD RAID for imsm/isw raids, use dmraid instead</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<envar>rd_NO_MDADMCONF</envar>
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</term>
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<listitem>
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<para>ignore mdadm.conf included in initramfs</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<envar>rd_MD_UUID=<replaceable><md uuid></replaceable></envar>
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</term>
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<listitem>
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<para>only activate the raid sets with the given UUID.
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This parameter can be specified multiple times.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect2>
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<refsect2>
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<title>DMRAID</title>
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<variablelist>
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<varlistentry>
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<term>
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<envar>rd_NO_DM</envar>
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</term>
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<listitem>
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<para>disable DM RAID detection</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<envar>rd_DM_UUID=<replaceable><dmraid uuid></replaceable></envar>
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</term>
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<listitem>
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<para>only activate the raid sets with the given UUID.
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This parameter can be specified multiple times.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect2>
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<refsect2>
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<title>Network</title>
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<variablelist>
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<varlistentry>
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<term><envar>ip=</envar>{dhcp|on|any|dhcp6|auto6}</term>
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<listitem>
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<para>dhcp|on|any: get ip from dhcp server from all interfaces. If root=dhcp,
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loop sequentially through all interfaces (eth0, eth1, ...) and use the first
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with a valid DHCP root-path.</para>
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<para>auto6: do IPv6 autoconfiguration</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><envar>ip=</envar><replaceable><interface></replaceable>:{dhcp|on|any|dhcp6|auto6}</term>
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<listitem>
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<para>dhcp|on|any|dhcp6: get ip from dhcp server on a specific interface
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auto6: do IPv6 autoconfiguration
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This parameter can be specified multiple times.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><envar>ip=</envar><replaceable><client-IP></replaceable>:<optional>
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<replaceable><server-id></replaceable>
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</optional>:<gateway-IP>::<netmask>::<client_hostname>::<interface>::{none|off}</term>
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<listitem>
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<para>explicit network configuration. If you want do define a IPv6 address, put it in brackets (e.g. [2001:DB8::1]).
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This parameter can be specified multiple times.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><envar>ifname=</envar><interface>:<MAC></term>
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<listitem>
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<para>Assign network device name <interface> (ie eth0) to the NIC with MAC <MAC>.
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Note letters in the MAC-address must be lowercase!
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Note that if you use this option you <emphasis remap="B">must</emphasis> specify an ifname= argument
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for all interfaces used in ip= or fcoe= arguments
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This parameter can be specified multiple times.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><envar>bootdev=</envar><interface></term>
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<listitem>
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<para>specify network interface to use routing and netroot information from.
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Required if multiple ip= lines are used.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><envar>nameserver=</envar><IP> [nameserver=<IP> ...]</term>
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<listitem>
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<para>specify nameserver(s) to use</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect2>
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<refsect2>
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<title>NFS</title>
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<variablelist>
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<varlistentry>
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<term><envar>root=</envar>[<server-ip>:]<root-dir>[:<nfs-options>]</term>
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<listitem>
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<para>mount nfs share from <server-ip>:/<root-dir>, if no server-ip is given,
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use dhcp next_server. if server-ip is an IPv6 address it has to be put in brackets, e.g. [2001:DB8::1].
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NFS options can be appended with the prefix ":" or "," and are seperated by ",".</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><envar>root=</envar>nfs:[<server-ip>:]<root-dir>[:<nfs-options>]</term>
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<term><envar>root=</envar>nfs4:[<server-ip>:]<root-dir>[:<nfs-options>]</term>
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<term><envar>root=</envar>dhcp|dhcp6</term>
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<listitem>
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<para>root=dhcp alone directs initrd to look at the DHCP root-path where NFS
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options can be specified.
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root-path=<server-ip>:<root-dir>[,<nfs-options>]
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root-path=nfs:<server-ip>:<root-dir>[,<nfs-options>]
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root-path=nfs4:<server-ip>:<root-dir>[,<nfs-options>]</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><envar>root=</envar>/dev/nfs<envar> nfsroot=</envar>[<server-ip>:]<root-dir>[,<nfs-options>]</term>
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<listitem>
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<para><emphasis remap="B">Deprecated!</emphasis> kernel Documentation/filesystems/nfsroot.txt defines
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this method.
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This is supported by dracut but not recommended.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis remap="B">rd_NFS_DOMAIN=</emphasis><NFSv4 domain name></term>
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<listitem>
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<para>Set the NFSv4 domain name. Will overwrite the settings in /etc/idmap.conf.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect2>
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<refsect2>
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<title>iSCSI</title>
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<variablelist>
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<varlistentry>
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<term><envar>root=</envar>iscsi:[username:password[:reverse:password]@][<servername>]:[<protocol>]:[<port>]:[<LUN>]:<targetname></term>
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<listitem>
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<para>protocol defaults to "6", LUN defaults to "0".</para>
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<para>If the "servername" field is provided by BOOTP or DHCP, then that
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field is used in conjunction with other associated fields to contact
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the boot server in the Boot stage (Section 7). However, if the
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"servername" field is not provided, then the "targetname" field is
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then used in the Discovery Service stage in conjunction with other
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associated fields.</para>
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<para><ulink url="http://tools.ietf.org/html/rfc4173">http://tools.ietf.org/html/rfc4173</ulink></para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><envar>root=</envar>iscsi:[username:password[:reverse:password]@][<servername>]:[<protocol>]:[<port>]:[<LUN>]:<targetname></term>
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<listitem>
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<para>e.g. root=iscsi:192.168.50.1::::iqn.2009-06.dracut:target0</para>
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<para>If servername is an IPv6 address, it has to be put in brackets.
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e.g.
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root=iscsi:[2001:DB8::1]::::iqn.2009-06.dracut:target0</para>
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</listitem>
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</varlistentry>
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<varlistentry>
|
|
<term><envar>root=</envar>???<envar> netroot=</envar>iscsi:[username:password[:reverse:password]@][<servername>]:[<protocol>]:[<port>]:[<LUN>]:<targetname> ...</term>
|
|
<listitem>
|
|
<para>multiple netroot options allow setting up multiple iscsi disks
|
|
e.g.
|
|
root=UUID=12424547
|
|
netroot=iscsi:192.168.50.1::::iqn.2009-06.dracut:target0
|
|
netroot=iscsi:192.168.50.1::::iqn.2009-06.dracut:target1</para>
|
|
<para>If servername is an IPv6 address, it has to be put in brackets.
|
|
e.g.
|
|
netroot=iscsi:[2001:DB8::1]::::iqn.2009-06.dracut:target0</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><envar>root=</envar>???<envar> iscsi_initiator=</envar><initiator><target name><envar> iscsi_target_ip=</envar><target ip><envar> iscsi_target_port=</envar><target port><envar> iscsi_target_group=</envar><target group><envar> iscsi_username=</envar><username><envar> iscsi_password=</envar><password><envar> iscsi_in_username=</envar><in username><envar> iscsi_in_password=</envar><in password></term>
|
|
<listitem>
|
|
<para>manually specify all iscsistart parameter (see <userinput>iscsistart --help</userinput>)</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><envar>root=</envar>???<envar> iscsi_firmware</envar></term>
|
|
<listitem>
|
|
<para>will read the iscsi parameter from the BIOS firmware</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</refsect2>
|
|
<refsect2>
|
|
<title>FCoE</title>
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><envar>netroot=</envar>fcoe:<interface|MAC>:<dcb|nodcb></term>
|
|
<listitem>
|
|
<para>Try to connect to a FCoE SAN through the NIC specified by <interface> or <MAC>,
|
|
for the second argument, currently only nodcb is supported. Note letters in
|
|
the MAC-address must be lowercase!</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</refsect2>
|
|
<refsect2>
|
|
<title>NBD</title>
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><envar>root=</envar>nbd:<server>:<port>[:<fstype>][:<mountopts>]</term>
|
|
<listitem>
|
|
<para>mount nbd share from <server></para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><envar>root=</envar>dhcp</term>
|
|
<listitem>
|
|
<para>with dhcp root-path=nbd:<server>:<port>[:<fstype>][:<mountopts>]
|
|
root=dhcp alone directs initrd to look at the DHCP root-path where NBD
|
|
options can be specified.
|
|
This syntax is only usable in cases where you are directly mounting the volume
|
|
as the rootfs.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</refsect2>
|
|
<refsect2>
|
|
<title>DASD</title>
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><envar>rd_DASD_MOD=</envar>....</term>
|
|
<listitem>
|
|
<para>same syntax as the kernel module parameter (s390 only)</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><envar>rd_DASD=</envar><dasd_adaptor device bus ID>[,readonly=X][,use_diag=X][,erplog=X][,failfast=X]</term>
|
|
<listitem>
|
|
<para>activate DASD device with the given adaptor device bus ID and setting the sysfs attributes
|
|
to the specified values
|
|
This parameter can be specified multiple times.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</refsect2>
|
|
<refsect2>
|
|
<title>ZFCP</title>
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><envar>rd_ZFCP=</envar><zfcp adaptor device bus ID>,<WWPN>,<FCPLUN></term>
|
|
<listitem>
|
|
<para>rd_ZFCP can be specified multiple times on the kernel command line.</para>
|
|
<para>example: rd_ZFCP=0.0.4000,0x5005076300C213e9,0x5022000000000000</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term>
|
|
<envar>rd_NO_ZFCPCONF</envar>
|
|
</term>
|
|
<listitem>
|
|
<para>ignore zfcp.conf included in the initramfs</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</refsect2>
|
|
<refsect2>
|
|
<title>ZNET</title>
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><envar>rd_ZNET=</envar><nettype>,<subchannels>,<options></term>
|
|
<listitem>
|
|
<para>rd_ZNET can be specified multiple times on the kernel command line. Examples:
|
|
rd_ZNET=qeth,0.0.0600,0.0.0601,0.0.0602,layer2=1,portname=foo
|
|
rd_ZNET=ctc,0.0.0600,0.0.0601,0.0.0602,protocol=bar</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</refsect2>
|
|
<refsect2>
|
|
<title>Plymouth Boot Splash</title>
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term>
|
|
<envar>rd_NO_PLYMOUTH</envar>
|
|
</term>
|
|
<listitem>
|
|
<para>do not start plymouth. This will not work with encrypted partitions.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</refsect2>
|
|
</refsect1>
|
|
<refsect1>
|
|
<title>FILES</title>
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term>
|
|
<filename>/var/log/dracut.log</filename>
|
|
</term>
|
|
<listitem>
|
|
<para>logfile of initramfs image creation</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term>
|
|
<filename>/tmp/dracut.log</filename>
|
|
</term>
|
|
<listitem>
|
|
<para>logfile of initramfs image creation, if /var/log/dracut.log is not writable</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term>
|
|
<filename>/etc/dracut.conf</filename>
|
|
</term>
|
|
<listitem>
|
|
<para>see <citerefentry>
|
|
<refentrytitle>dracut.conf</refentrytitle>
|
|
<manvolnum>5</manvolnum>
|
|
</citerefentry></para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term>
|
|
<filename>/etc/dracut.conf.d/*.conf</filename>
|
|
</term>
|
|
<listitem>
|
|
<para>see <citerefentry>
|
|
<refentrytitle>dracut.conf</refentrytitle>
|
|
<manvolnum>5</manvolnum>
|
|
</citerefentry></para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
<refsect2>
|
|
<title>Configuration in the Initramfs</title>
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term>
|
|
<filename>/conf/conf.d/</filename>
|
|
</term>
|
|
<listitem>
|
|
<para>Any files found in /conf/conf.d/ will be sourced in the initramfs to
|
|
set initial values. Command line options will override these values
|
|
set in the configuration files.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term>
|
|
<filename>/etc/cmdline</filename>
|
|
</term>
|
|
<listitem>
|
|
<para>Can contain additional command line options.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</refsect2>
|
|
</refsect1>
|
|
<refsect1>
|
|
<title>See Also</title>
|
|
<para>
|
|
<citerefentry>
|
|
<refentrytitle>dracut</refentrytitle>
|
|
<manvolnum>8</manvolnum>
|
|
</citerefentry>
|
|
<citerefentry>
|
|
<refentrytitle>dracut.conf</refentrytitle>
|
|
<manvolnum>5</manvolnum>
|
|
</citerefentry>
|
|
</para>
|
|
</refsect1>
|
|
</refentry>
|