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47 lines
1.7 KiB
XML
47 lines
1.7 KiB
XML
<section xmlns="http://docbook.org/ns/docbook"
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xmlns:xlink="http://www.w3.org/1999/xlink"
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xmlns:xi="http://www.w3.org/2001/XInclude"
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version="5.0"
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xml:id="sec-luks-file-systems">
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<title>LUKS-Encrypted File Systems</title>
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<para>NixOS supports file systems that are encrypted using
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<emphasis>LUKS</emphasis> (Linux Unified Key Setup). For example,
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here is how you create an encrypted Ext4 file system on the device
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<filename>/dev/disk/by-uuid/3f6b0024-3a44-4fde-a43a-767b872abe5d</filename>:
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<screen>
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# cryptsetup luksFormat /dev/disk/by-uuid/3f6b0024-3a44-4fde-a43a-767b872abe5d
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WARNING!
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========
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This will overwrite data on /dev/disk/by-uuid/3f6b0024-3a44-4fde-a43a-767b872abe5d irrevocably.
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Are you sure? (Type uppercase yes): YES
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Enter LUKS passphrase: ***
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Verify passphrase: ***
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# cryptsetup luksOpen /dev/disk/by-uuid/3f6b0024-3a44-4fde-a43a-767b872abe5d crypted
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Enter passphrase for /dev/disk/by-uuid/3f6b0024-3a44-4fde-a43a-767b872abe5d: ***
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# mkfs.ext4 /dev/mapper/crypted
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</screen>
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To ensure that this file system is automatically mounted at boot time
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as <filename>/</filename>, add the following to
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<filename>configuration.nix</filename>:
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<programlisting>
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<link linkend="opt-boot.initrd.luks.devices._name__.device">boot.initrd.luks.devices.crypted.device</link> = "/dev/disk/by-uuid/3f6b0024-3a44-4fde-a43a-767b872abe5d";
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<xref linkend="opt-fileSystems"/>."/".device = "/dev/mapper/crypted";
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</programlisting>
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Should grub be used as bootloader, and <filename>/boot</filename> is located
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on an encrypted partition, it is necessary to add the following grub option:
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<programlisting><xref linkend="opt-boot.loader.grub.enableCryptodisk"/> = true;</programlisting>
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</para>
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</section>
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