mirror of
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278 lines
9.6 KiB
XML
278 lines
9.6 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-release-16.09">
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<title>Release 16.09 (“Flounder”, 2016/09/30)</title>
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<para>
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In addition to numerous new and upgraded packages, this release has the
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following highlights:
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</para>
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<itemizedlist>
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<listitem>
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<para>
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Many NixOS configurations and Nix packages now use significantly less disk
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space, thanks to the
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<link
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xlink:href="https://github.com/NixOS/nixpkgs/issues/7117">extensive
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work on closure size reduction</link>. For example, the closure size of a
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minimal NixOS container went down from ~424 MiB in 16.03 to ~212 MiB in
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16.09, while the closure size of Firefox went from ~651 MiB to ~259 MiB.
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</para>
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</listitem>
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<listitem>
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<para>
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To improve security, packages are now
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<link
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xlink:href="https://github.com/NixOS/nixpkgs/pull/12895">built
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using various hardening features</link>. See the Nixpkgs manual for more
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information.
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</para>
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</listitem>
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<listitem>
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<para>
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Support for PXE netboot. See <xref
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linkend="sec-booting-from-pxe" />
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for documentation.
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</para>
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</listitem>
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<listitem>
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<para>
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X.org server 1.18. If you use the <literal>ati_unfree</literal> driver,
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1.17 is still used due to an ABI incompatibility.
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</para>
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</listitem>
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<listitem>
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<para>
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This release is based on Glibc 2.24, GCC 5.4.0 and systemd 231. The default
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Linux kernel remains 4.4.
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</para>
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</listitem>
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</itemizedlist>
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<para>
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The following new services were added since the last release:
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</para>
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<itemizedlist>
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<listitem>
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<para>
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<literal>(this will get automatically generated at release time)</literal>
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</para>
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</listitem>
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</itemizedlist>
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<para>
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When upgrading from a previous release, please be aware of the following
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incompatible changes:
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</para>
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<itemizedlist>
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<listitem>
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<para>
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A large number of packages have been converted to use the multiple outputs
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feature of Nix to greatly reduce the amount of required disk space, as
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mentioned above. This may require changes to any custom packages to make
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them build again; see the relevant chapter in the Nixpkgs manual for more
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information. (Additional caveat to packagers: some packaging conventions
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related to multiple-output packages
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<link xlink:href="https://github.com/NixOS/nixpkgs/pull/14766">were
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changed</link> late (August 2016) in the release cycle and differ from the
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initial introduction of multiple outputs.)
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</para>
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</listitem>
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<listitem>
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<para>
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Previous versions of Nixpkgs had support for all versions of the LTS
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Haskell package set. That support has been dropped. The previously provided
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<literal>haskell.packages.lts-x_y</literal> package sets still exist in
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name to aviod breaking user code, but these package sets don't actually
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contain the versions mandated by the corresponding LTS release. Instead,
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our package set it loosely based on the latest available LTS release, i.e.
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LTS 7.x at the time of this writing. New releases of NixOS and Nixpkgs will
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drop those old names entirely.
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<link
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xlink:href="https://nixos.org/nix-dev/2016-June/020585.html">The
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motivation for this change</link> has been discussed at length on the
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<literal>nix-dev</literal> mailing list and in
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<link
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xlink:href="https://github.com/NixOS/nixpkgs/issues/14897">Github
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issue #14897</link>. Development strategies for Haskell hackers who want to
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rely on Nix and NixOS have been described in
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<link
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xlink:href="https://nixos.org/nix-dev/2016-June/020642.html">another
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nix-dev article</link>.
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</para>
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</listitem>
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<listitem>
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<para>
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Shell aliases for systemd sub-commands
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<link xlink:href="https://github.com/NixOS/nixpkgs/pull/15598">were
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dropped</link>: <command>start</command>, <command>stop</command>,
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<command>restart</command>, <command>status</command>.
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</para>
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</listitem>
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<listitem>
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<para>
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Redis now binds to 127.0.0.1 only instead of listening to all network
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interfaces. This is the default behavior of Redis 3.2
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</para>
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</listitem>
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<listitem>
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<para>
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<literal>/var/empty</literal> is now immutable. Activation script runs
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<command>chattr +i</command> to forbid any modifications inside the folder.
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See <link xlink:href="https://github.com/NixOS/nixpkgs/pull/18365"> the
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pull request</link> for what bugs this caused.
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</para>
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</listitem>
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<listitem>
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<para>
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Gitlab's maintainance script <command>gitlab-runner</command> was removed
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and split up into the more clearer <command>gitlab-run</command> and
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<command>gitlab-rake</command> scripts, because
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<command>gitlab-runner</command> is a component of Gitlab CI.
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</para>
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</listitem>
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<listitem>
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<para>
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<literal>services.xserver.libinput.accelProfile</literal> default changed
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from <literal>flat</literal> to <literal>adaptive</literal>, as per
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<link xlink:href="https://wayland.freedesktop.org/libinput/doc/latest/group__config.html#gad63796972347f318b180e322e35cee79">
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official documentation</link>.
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</para>
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</listitem>
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<listitem>
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<para>
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<literal>fonts.fontconfig.ultimate.rendering</literal> was removed because
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our presets were obsolete for some time. New presets are hardcoded into
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FreeType; you can select a preset via
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<literal>fonts.fontconfig.ultimate.preset</literal>. You can customize
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those presets via ordinary environment variables, using
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<literal>environment.variables</literal>.
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</para>
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</listitem>
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<listitem>
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<para>
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The <literal>audit</literal> service is no longer enabled by default. Use
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<literal>security.audit.enable = true</literal> to explicitly enable it.
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</para>
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</listitem>
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<listitem>
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<para>
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<literal>pkgs.linuxPackages.virtualbox</literal> now contains only the
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kernel modules instead of the VirtualBox user space binaries. If you want
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to reference the user space binaries, you have to use the new
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<literal>pkgs.virtualbox</literal> instead.
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</para>
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</listitem>
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<listitem>
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<para>
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<literal>goPackages</literal> was replaced with separated Go applications
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in appropriate <literal>nixpkgs</literal> categories. Each Go package uses
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its own dependency set. There's also a new <literal>go2nix</literal> tool
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introduced to generate a Go package definition from its Go source
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automatically.
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</para>
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</listitem>
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<listitem>
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<para>
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<literal>services.mongodb.extraConfig</literal> configuration format was
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changed to YAML.
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</para>
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</listitem>
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<listitem>
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<para>
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PHP has been upgraded to 7.0
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</para>
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</listitem>
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</itemizedlist>
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<para>
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Other notable improvements:
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</para>
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<itemizedlist>
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<listitem>
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<para>
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Revamped grsecurity/PaX support. There is now only a single general-purpose
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distribution kernel and the configuration interface has been streamlined.
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Desktop users should be able to simply set
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<programlisting>security.grsecurity.enable = true</programlisting>
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to get a reasonably secure system without having to sacrifice too much
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functionality.
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</para>
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</listitem>
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<listitem>
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<para>
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Special filesystems, like <literal>/proc</literal>, <literal>/run</literal>
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and others, now have the same mount options as recommended by systemd and
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are unified across different places in NixOS. Mount options are updated
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during <command>nixos-rebuild switch</command> if possible. One benefit
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from this is improved security — most such filesystems are now mounted
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with <literal>noexec</literal>, <literal>nodev</literal> and/or
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<literal>nosuid</literal> options.
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</para>
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</listitem>
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<listitem>
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<para>
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The reverse path filter was interfering with DHCPv4 server operation in the
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past. An exception for DHCPv4 and a new option to log packets that were
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dropped due to the reverse path filter was added
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(<literal>networking.firewall.logReversePathDrops</literal>) for easier
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debugging.
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</para>
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</listitem>
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<listitem>
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<para>
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Containers configuration within
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<literal>containers.<name>.config</literal> is
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<link
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xlink:href="https://github.com/NixOS/nixpkgs/pull/17365">now
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properly typed and checked</link>. In particular, partial configurations
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are merged correctly.
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</para>
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</listitem>
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<listitem>
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<para>
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The directory container setuid wrapper programs,
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<filename>/var/setuid-wrappers</filename>,
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<link
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xlink:href="https://github.com/NixOS/nixpkgs/pull/18124">is now
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updated atomically to prevent failures if the switch to a new configuration
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is interrupted.</link>
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</para>
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</listitem>
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<listitem>
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<para>
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<literal>services.xserver.startGnuPGAgent</literal> has been removed due to
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GnuPG 2.1.x bump. See
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<link
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xlink:href="https://github.com/NixOS/nixpkgs/commit/5391882ebd781149e213e8817fba6ac3c503740c">
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how to achieve similar behavior</link>. You might need to <literal>pkill
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gpg-agent</literal> after the upgrade to prevent a stale agent being in the
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way.
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</para>
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</listitem>
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<listitem>
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<para>
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<link xlink:href="https://github.com/NixOS/nixpkgs/commit/e561edc322d275c3687fec431935095cfc717147">
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Declarative users could share the uid due to the bug in the script handling
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conflict resolution. </link>
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</para>
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</listitem>
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<listitem>
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<para>
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Gummi boot has been replaced using systemd-boot.
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</para>
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</listitem>
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<listitem>
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<para>
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Hydra package and NixOS module were added for convenience.
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</para>
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</listitem>
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</itemizedlist>
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</section>
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