You can now do a fast reboot (bypassing the BIOS, which may take
several minutes on servers) by running ‘systemctl kexec’.
Unfortunately the QEMU test for this is unreliable due to a QEMU bug
(it randomly crashes with a message like ‘Guest moved used index from
8 to 0’), so it's commented out.
Testing this is useful in any case, but it's necessary now because Nix
1.6 doesn't check the binary cache for fetchurl output anymore.
http://hydra.nixos.org/build/6144188
Aspell can only handle one dict-dir directive and currently we hardocde
that to
ASPELL_CONF="dict-dir $HOME/.nix-profile/lib/aspell"
This means that aspell doesn't work if it is installed to the system or
default nix profile -- it only works in the user profile.
With this change, aspell can be installed to any of the nix profiles. If
it is installed in more than one profile, the most "local" profile wins
(i.e. sysadmin can set up a default, users can override it).
This reduces code duplication, but more importantly means that the
DRI modules can be found by X enabling hardware acceleration.
Close#249; the PR also refers to more about DRI modules.
Set "networking.tcpcrypt.enable = true;" to enable opportunistic TCP encryption
based on the user-space tools available from <http://tcpcrypt.org>.
Network attackers come in two varieties: passive and active (man-in-the-middle).
Passive attacks are much simpler to execute because they just require listening
on the network. Active attacks are much harder as they require listening and
modifying network traffic, often requiring very precise timing that can make
some attacks impractical.
Opportunistic encryption cannot protect against active attackers, but it *does*
protect against passive attackers. Furthermore, Tcpcrypt is powerful enough to
stop active attacks, too, if the application using it performs authentication.
A complete description of the protocol extension can be found at
<http://tools.ietf.org/html/draft-bittau-tcp-crypt-00>.
I.e., modules that use "require = [options]". Nowadays that should be
written as
{
options = { ... };
config = { ... };
};
Also, use "imports" instead of "require" in places where we actually
import another module.
Previously, the zfs binaries were put in $out/sbin where the stage-1
patchelf wouldn't fix them up. This would fail the allowedReferences
test.
Move the zfs binaries to $out/bin.
The NixOS config need not be $NIXOS_CONFIG, it can also be set through
-I nixos-config=... or not exist in a separate file at all (e.g. in a
NixOps deployment).
Issue #212.
dramatically speeds up my boot time because it was the last
service (for me) that depended on udev-settle.service
udev-settle isn't needed for modern system initialization but some
oldschool services (mdadm/lvm/cryptsetup) depend on it so they can
just enumerate devices instead of having to react to changes
dynamically. In NixOS these things are usually already taken care of
during stage 1 (early ramdisk) if you use them.
The option services.openssh.hostKeys now allows specifying multiple
host keys. The default value enables both a DSA and ECDSA key.
(Clients by default will use the ECDSA key, unless known_hosts already
has a DSA key for that host.) To use only an ECDSA key, you can say:
services.openssh.hostKeys =
[ { path = "/etc/ssh/ssh_host_ecdsa_key";
type = "ecdsa";
bits = 521;
}
];
