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223 lines
7.1 KiB
223 lines
7.1 KiB
<refentry 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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<refmeta>
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<refentrytitle><command>nixos-install</command></refentrytitle>
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<manvolnum>8</manvolnum>
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<refmiscinfo class="source">NixOS</refmiscinfo>
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<!-- <refmiscinfo class="version"><xi:include href="version.txt" parse="text"/></refmiscinfo> -->
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</refmeta>
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<refnamediv>
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<refname><command>nixos-install</command></refname>
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<refpurpose>install bootloader and NixOS</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<cmdsynopsis>
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<command>nixos-install</command>
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<arg>
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<arg choice='plain'><option>-I</option></arg>
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<replaceable>path</replaceable>
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</arg>
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<arg>
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<arg choice='plain'><option>--root</option></arg>
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<replaceable>root</replaceable>
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</arg>
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<arg>
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<arg choice='plain'><option>--closure</option></arg>
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<replaceable>closure</replaceable>
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</arg>
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<arg>
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<arg choice='plain'><option>--no-channel-copy</option></arg>
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</arg>
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<arg>
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<arg choice='plain'><option>--no-root-passwd</option></arg>
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</arg>
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<arg>
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<arg choice='plain'><option>--no-bootloader</option></arg>
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</arg>
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<arg>
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<group choice='req'>
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<arg choice='plain'><option>--max-jobs</option></arg>
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<arg choice='plain'><option>-j</option></arg>
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</group>
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<replaceable>number</replaceable>
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</arg>
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<arg>
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<option>--cores</option>
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<replaceable>number</replaceable>
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</arg>
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<arg>
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<option>--option</option>
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<replaceable>name</replaceable>
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<replaceable>value</replaceable>
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</arg>
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<arg>
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<arg choice='plain'><option>--show-trace</option></arg>
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</arg>
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<arg>
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<arg choice='plain'><option>--chroot</option></arg>
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</arg>
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<arg>
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<arg choice='plain'><option>--help</option></arg>
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</arg>
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</cmdsynopsis>
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</refsynopsisdiv>
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<refsection><title>Description</title>
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<para>This command installs NixOS in the file system mounted on
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<filename>/mnt</filename>, based on the NixOS configuration specified
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in <filename>/mnt/etc/nixos/configuration.nix</filename>. It performs
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the following steps:
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<itemizedlist>
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<listitem><para>It copies Nix and its dependencies to
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<filename>/mnt/nix/store</filename>.</para></listitem>
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<listitem><para>It runs Nix in <filename>/mnt</filename> to build
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the NixOS configuration specified in
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<filename>/mnt/etc/nixos/configuration.nix</filename>.</para></listitem>
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<listitem><para>It installs the GRUB boot loader on the device
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specified in the option <option>boot.loader.grub.device</option>
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(unless <option>--no-bootloader</option> is specified),
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and generates a GRUB configuration file that boots into the NixOS
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configuration just installed.</para></listitem>
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<listitem><para>It prompts you for a password for the root account
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(unless <option>--no-root-passwd</option> is specified).</para></listitem>
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</itemizedlist>
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</para>
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<para>This command is idempotent: if it is interrupted or fails due to
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a temporary problem (e.g. a network issue), you can safely re-run
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it.</para>
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</refsection>
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<refsection><title>Options</title>
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<para>This command accepts the following options:</para>
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<variablelist>
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<varlistentry>
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<term><option>--root</option></term>
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<listitem>
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<para>Defaults to <filename>/mnt</filename>. If this option is given, treat the directory
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<replaceable>root</replaceable> as the root of the NixOS installation.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--closure</option></term>
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<listitem>
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<para>If this option is provided, <command>nixos-install</command> will install the specified closure
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rather than attempt to build one from <filename>/mnt/etc/nixos/configuration.nix</filename>.</para>
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<para>The closure must be an appropriately configured NixOS system, with boot loader and partition
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configuration that fits the target host. Such a closure is typically obtained with a command such as
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<command>nix-build -I nixos-config=./configuration.nix '<nixos>' -A system --no-out-link</command>
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-I</option></term>
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<listitem>
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<para>Add a path to the Nix expression search path. This option may be given multiple times.
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See the NIX_PATH environment variable for information on the semantics of the Nix search path.
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Paths added through <replaceable>-I</replaceable> take precedence over NIX_PATH.</para>
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</listitem>
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</varlistentry>
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<varlistentry><term><option>--max-jobs</option></term>
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<term><option>-j</option></term>
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<listitem><para>Sets the maximum number of build jobs that Nix will
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perform in parallel to the specified number. The default is <literal>1</literal>.
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A higher value is useful on SMP systems or to exploit I/O latency.</para></listitem>
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</varlistentry>
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<varlistentry><term><option>--cores</option></term>
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<listitem><para>Sets the value of the <envar>NIX_BUILD_CORES</envar>
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environment variable in the invocation of builders. Builders can
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use this variable at their discretion to control the maximum amount
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of parallelism. For instance, in Nixpkgs, if the derivation
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attribute <varname>enableParallelBuilding</varname> is set to
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<literal>true</literal>, the builder passes the
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<option>-j<replaceable>N</replaceable></option> flag to GNU Make.
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The value <literal>0</literal> means that the builder should use all
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available CPU cores in the system.</para></listitem>
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</varlistentry>
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<varlistentry><term><option>--option</option> <replaceable>name</replaceable> <replaceable>value</replaceable></term>
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<listitem><para>Set the Nix configuration option
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<replaceable>name</replaceable> to <replaceable>value</replaceable>.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--show-trace</option></term>
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<listitem>
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<para>Causes Nix to print out a stack trace in case of Nix expression evaluation errors.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--chroot</option></term>
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<listitem>
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<para>Chroot into given installation. Any additional arguments passed are going to be executed inside the chroot.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--help</option></term>
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<listitem>
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<para>Synonym for <command>man nixos-install</command>.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsection>
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<refsection><title>Examples</title>
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<para>A typical NixOS installation is done by creating and mounting a
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file system on <filename>/mnt</filename>, generating a NixOS
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configuration in
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<filename>/mnt/etc/nixos/configuration.nix</filename>, and running
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<command>nixos-install</command>. For instance, if we want to install
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NixOS on an <literal>ext4</literal> file system created in
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<filename>/dev/sda1</filename>:
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<screen>
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$ mkfs.ext4 /dev/sda1
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$ mount /dev/sda1 /mnt
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$ nixos-generate-config --root /mnt
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$ # edit /mnt/etc/nixos/configuration.nix
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$ nixos-install
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$ reboot
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</screen>
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</para>
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</refsection>
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</refentry>
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