document options to nixos-install script

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nixos
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nixos/doc/manual/man-nixos-install.xml
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<refnamediv>
<refname><command>nixos-install</command></refname>
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<refpurpose>install NixOS</refpurpose>
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<refpurpose>install bootloader and NixOS</refpurpose>
</refnamediv>
<refsynopsisdiv>
<cmdsynopsis>
<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>--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>
</cmdsynopsis>
</refsynopsisdiv>
···
</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>-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>
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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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$ nixos-generate-config --root /mnt
$ # edit /mnt/etc/nixos/configuration.nix
$ nixos-install
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$ reboot
</screen>
</para>
+1 -1
nixos/doc/manual/man-pages.xml
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</author>
<copyright>
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<year>2007-2013</year>
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<year>2007-2015</year>
<holder>Eelco Dolstra</holder>
</copyright>