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sudo apt-get install python-software-properties
sudo add-apt-repository ppa:ubuntu-toolchain-r/test
sudo apt-get update
sudo apt-get install gcc-4.9
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.9 50
sudo apt-get install g++-4.9
sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-4.9 50

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Ubuntu 16.04 安装英伟达（Nvidia）显卡驱动

配有英伟达显卡的主机，装完 Ubuntu 16.04 后出现闪屏现象，是由于没有安装显卡驱动。

显卡型号
NVIDIA Corporation GM204 [GeForce GTX 970]

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        Getting started aws ses
http://codechannels.com/video/amazonwebservices/cloud/getting-started-with-amazon-ses/

1.   Verify email address

In the sandbox you can send email only from emails yiu have verified.
Go to email AWS SES then on the left clcik on 'verified senders'
to start the verification process:
 a. click 'verify a ne sender'
  in the dialogue box add your email and click submit. you will receive

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pragma solidity ^0.4.10;

contract Ownable {
  address owner;
  function Ownable() public {
    owner = msg.sender;
  }

  modifier Owned {
    require(msg.sender == owner);

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#!/usr/bin/env ruby
# untitled.rb

# Created by Paolo Bosetti on 2011-04-22.
# Copyright (c) 2011 University of Trento. All rights reserved.

require "rubygems"
require 'ffi'

module Shared

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# 1. Clear retry set

Sidekiq::RetrySet.new.clear

# 2. Clear scheduled jobs 

Sidekiq::ScheduledSet.new.clear

# 3. Clear 'Processed' and 'Failed' jobs

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# First the end result of what we want:

class Foo
  before_hook :whoa
  before_hook :amazing

  def test
    puts "This is kinda cool!"
  end

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Configure Git to use a proxy

In Brief

You may need to configure a proxy server if you're having trouble cloning or fetching from a remote repository or getting an error like unable to access '...' Couldn't resolve host '...'.

Consider something like:

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分辨需要设置的代理

• HTTP 形式：

  git clone https://github.com/owner/git.git

• SSH 形式：

  git clone git@github.com:owner/git.git

一、HTTP 形式

走 HTTP 代理

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class DirtyPipeline::Action
  module WrappedCall
    def call
      Events.publish! Event.generate(self)
      super
    end
  end

  class << self
    attr_accessor :attempted_event_klass, :pipeline, :timeout