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authorFrans Pop <elendil@planet.nl>2006-09-15 10:38:52 +0000
committerFrans Pop <elendil@planet.nl>2006-09-15 10:38:52 +0000
commit7ca86930041a99a5f13321edffc51fd1c732e9be (patch)
tree6b6375627d7821ca865486bf79d9488661a7196f /en/boot-new
parentc0c796042a28e14d39ff61e049354ca327e96e0a (diff)
downloadinstallation-guide-7ca86930041a99a5f13321edffc51fd1c732e9be.zip
Fix commit log because of accidental commit
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-<!-- retain these comments for translator revision tracking -->
-<!-- $Id$ -->
-
- <sect1 id="mount-encrypted-volumes">
- <title>Mounting encrypted volumes</title>
-
-<para>
-
-If you created encrypted volumes during the installation and assigned
-them mount points, you will be asked to enter the passphrase for each
-of these volumes during the boot. The actual procedure differs
-slightly between dm-crypt and loop-AES.
-
-</para>
-
- <sect2 id="mount-dm-crypt">
- <title>dm-crypt</title>
-
-<para>
-
-For partitions encrypted using dm-crypt you will be shown the following
-prompt during the boot:
-
-<informalexample><screen>
-Starting early crypto disks... crypt<replaceable>X</replaceable>(starting)
-Enter LUKS passphrase:
-</screen></informalexample>
-
-In the first line of the prompt, <replaceable>X</replaceable> is the
-number of the loop device. You are now probably wondering
-<emphasis>for which volume</emphasis> you are actually entering the
-passphrase. Does it relate to your <filename>/home</filename>? Or to
-<filename>/var</filename>? Of course, if you have just one encrypted
-volume, this is easy and you can just enter the passphrase you used
-when setting up this volume. If you set up more than one encrypted
-volume during the installation, the notes you wrote down as the last
-step in <xref linkend="partman-crypto"/> come in handy. If you did not
-make a note of the mapping between
-<filename>crypt<replaceable>X</replaceable></filename> and the mount
-points before, you can still find it
-in <filename>/etc/crypttab</filename>
-and <filename>/etc/fstab</filename> of your new system.
-
-</para><para>
-
-The prompt may look somewhat different when an encrypted root file system is
-mounted. This depends on which initramfs generator was used to generate the
-initrd used to boot the system. The example below is for an initrd generated
-using <classname>initramfs-tools</classname>:
-
-<informalexample><screen>
-Begin: Mounting <emphasis>root file system</emphasis>... ...
-Begin: Running /scripts/local-top ...
-Enter LUKS passphrase:
-</screen></informalexample>
-
-</para><para>
-
-No characters (even asterisks) will be shown while entering the passphrase.
-If you enter the wrong passphrase, you have two more tries to correct it.
-After the third try the boot process will skip this volume and continue to
-mount the next filesystem. Please see <xref linkend="crypto-troubleshooting"/>
-for further information.
-
-</para><para>
-
-After entering all passphrases the boot should continue as usual.
-
-</para>
- </sect2>
-
- <sect2 id="mount-loop-aes">
- <title>loop-AES</title>
-
-<para>
-
-For partitions encrypted using loop-AES you will be shown the following
-prompt during the boot:
-
-<informalexample><screen>
-Checking loop-encrypted file systems.
-Setting up /dev/loop<replaceable>X</replaceable> (/<replaceable>mountpoint</replaceable>)
-Password:
-</screen></informalexample>
-
-</para><para>
-
-No characters (even asterisks) will be shown while entering the passphrase.
-If you enter the wrong passphrase, you have two more tries to correct it.
-After the third try the boot process will skip this volume and continue to
-mount the next filesystem. Please see <xref linkend="crypto-troubleshooting"/>
-for further information.
-
-</para><para>
-
-After entering all passphrases the boot should continue as usual.
-
-</para>
- </sect2>
-
- <sect2 id="crypto-troubleshooting">
- <title>Troubleshooting</title>
-
-<para>
-
-If some of the encrypted volumes could not be mounted because a wrong
-passphrase was entered, you will have to mount them manually after the
-boot. There are several cases.
-
-</para>
-
-<itemizedlist>
-<listitem><para>
-
-The first case concerns the root partition. When it is not mounted
-correctly, the boot process will halt and you will have to reboot the
-computer to try again.
-
-</para></listitem>
-<listitem><para>
-
-The easiest case is for encrypted volumes holding data like
-<filename>/home</filename> or <filename>/srv</filename>. You can
-simply mount them manually after the boot. For loop-AES this is
-one-step operation:
-
-<informalexample><screen>
-<prompt>#</prompt> <userinput>mount <replaceable>/mount_point</replaceable></userinput>
-<prompt>Password:</prompt>
-</screen></informalexample>
-
-where <replaceable>/mount_point</replaceable> should be replaced by
-the particular directory (e.g. <filename>/home</filename>). The only
-difference from an ordinary mount is that you will be asked to enter
-the passphrase for this volume.
-
-</para><para>
-
-For dm-crypt this is a bit trickier. First you need to register the
-volumes with <application>device mapper</application> by running:
-
-<informalexample><screen>
-<prompt>#</prompt> <userinput>/etc/init.d/cryptdisks start</userinput>
-</screen></informalexample>
-
-This will scan all volumes mentioned
-in <filename>/etc/crypttab</filename> and will create appropriate
-devices under the <filename>/dev</filename> directory after entering
-the correct passphrases. (Already registered volumes will be skipped,
-so you can repeat this command several times without worrying.) After
-successful registration you can simply mount the volumes the usual
-way:
-
-<informalexample><screen>
-<prompt>#</prompt> <userinput>mount <replaceable>/mount_point</replaceable></userinput>
-</screen></informalexample>
-
-</para></listitem>
-<listitem><para>
-
-If any volume holding noncritical system files could not be mounted
-(<filename>/usr</filename> or <filename>/var</filename>), the system
-should still boot and you should be able to mount the volumes manually
-like in the previous case. However, you will also need to (re)start
-any services usually running in your default runlevel because it is
-very likely that they were not started. The easiest way to achieve
-this is by switching to the first runlevel and back by entering
-
-<informalexample><screen>
-<prompt>#</prompt> <userinput>init 1</userinput>
-</screen></informalexample>
-
-at the shell prompt and pressing <keycombo> <keycap>Control</keycap>
-<keycap>D</keycap> </keycombo> when asked for the root password.
-
-</para></listitem>
-</itemizedlist>
-
- </sect2>
- </sect1>