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#eno1.10 is outside, eno1.20 is inside.
services.dnsmasq = {
    enable = true;
    resolveLocalQueries = true;
    extraConfig = ''
      dhcp-range=::1,::ffff,constructor:eno1.20,ra-names,48h
      #and other stuff
    '';
};

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#!/bin/sh
killall ircomm >/dev/null
ircomm -d /dev/cuaa1 -y /dev/ptypv -v2 

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    systemd.services.somemachine-rsync = {
      after = [
        "zfs-import-tank.service"
      ];
      path = [ pkgs.rsync ];
      #this notifies another unit in case it fails, i get a text to my phone.
      onFailure = [
        "unit-status@%n"
      ];
      script = ''

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    #10 is wan interface, 20 is lan, 25 is my bench/thing i want to keep away from internal.
    
    
    #let established flows from bench to lan work
    iptables -A FORWARD -i eno1.25 -o eno1.20 -m state --state ESTABLISHED,RELATED -j ACCEPT
    #let bench to internet work
    iptables -A FORWARD -i eno1.25 -o eno1.10 -j ACCEPT
    #let established flows from internet to bench go
    iptables -A FORWARD -i eno1.10 -o eno1.25 -m state --state ESTABLISHED,RELATED -j ACCEPT
    #drop everything else.

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[nix-shell:~]$ echo "(import ./default.nix).bar" | hnix -
import ./default.nix.bar

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nix-repl> builtins.fetchGit { url = "https://github.com/dailykos/nixpkgs.git"; ref = "master"; }
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
error: program 'git' failed with exit code 1

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0ogre:~% buildthis ./m6YaTZaL.txt
these derivations will be built:
  /nix/store/xfazdy12k9bbnby3y1n77snmy073gnkc-rocketchat_2.10.5_amd64.deb.drv
  /nix/store/ig4z35cb0y3v3wncyxh5iqq12nxspp8b-rocketchat-2.10.5.drv
these paths will be fetched (2.35 MiB download, 14.98 MiB unpacked):
  /nix/store/2mjsfm0c4hkxamsn7rr6x2iabj95dak1-gconf-3.2.6
  /nix/store/3isyxdp6wmz7kabxqld8fky2ci51ql0s-libxkbfile-1.0.9
  /nix/store/amcjwgn9jchlpwr33d4gyk7qr3smqpss-ORBit2-2.14.19
  /nix/store/jlvwk1ijr4z3zq0nw34kkd88bjwrp7zi-dpkg-1.19.0.5
  /nix/store/wl5cg4fa3jj7jgnwxq7h5dbkrjc62iaw-libnotify-0.7.7

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0ogre:~/t% nix-shell -p bundix
these paths will be fetched (0.01 MiB download, 0.03 MiB unpacked):
  /nix/store/prirzp3f5gwl3k2lcnbr317gb7g6sfxb-bundix-2.3.1
copying path '/nix/store/prirzp3f5gwl3k2lcnbr317gb7g6sfxb-bundix-2.3.1' from 'https://cache.nixos.org'...

[nix-shell:~/t]$ cat Gemfile
source 'https://rubygems.org'
gem 'nokogiri'

[nix-shell:~/t]$ bundix -l; bundix -i

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{ configuration ? import ./lib/from-env.nix "NIXOS_CONFIG" <nixos-config>
, system ? builtins.currentSystem
}:

let

  eval = import ./lib/eval-config.nix {
    inherit system;
    modules = [ configuration ];
  };

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#!/usr/bin/env nix-shell
#!nix-shell -p python27Packages.pygobject3 python27Packages.pygtk -i python

URL="http://git.alsa-project.org/?p=alsa.git;a=blob_plain;f=hda-analyzer/"
FILES=["hda_analyzer.py", "hda_guilib.py", "hda_codec.py", "hda_proc.py",
       "hda_graph.py", "hda_mixer.py"]

try:
  import gobject
  import gtk