1 快捷键

Shift+Enter：运行当前 cell，并移动到下一个 cell
Ctrl+Enter：运行当前 cell

2 设置工作路径

2.1 设置临时工作路径（没有成功）

1 启动 GraphLab Create

The first time you use GraphLab create, you must enter a product key to license the software for non-commerical academic use. To register for a free one-year academic license and obtain your key, go to dato.com.

1 Keyboard Input（键盘输入）

We will focus on combining text drawing in the canvas with timers to build a simple digital stopwatch that keeps track of the time in tenths of a second. The stopwatch should contain “Start”, “Stop” and “Reset” buttons.

One of the simplest two-player games is “Guess the number”. The first player thinks of a secret number in some known range while the second player attempts to guess the number. After each guess, the first player answers either “Higher”, “Lower” or “Correct!” depending on whether the secret number is higher, lower or equal to the guess. In this project, you will build a simple interactive program in Python where the computer will take the role of the first player while you play as the second player.

1. 在 eclipse 中新建一个 Java Project
2. 导入依赖：右键 Project 名称，打开 Properties 选项卡，打开“Java Build Path”，选择“Libraries”，“Add External JARs”，将文件hadoop-1.1.2下 7 个 jar 包导入，如下图所示：
   
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命令形式：hadoop fs 具体操作
例：
查看目录下的文件：hadoop fs -ls 目录

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[root@hadoop ~]# hadoop fs -ls /    查看根目录下的数据
Found 1 items
drwxr-xr-x   - root supergroup          0 2016-11-19 04:49 /usr    说明该目录下有个“/usr”目录

查看目录下的文件：hadoop fs -lsr 目录

在 eclipse 中新建 Java Project（笔者将 Project 简单粗暴的命名为“Hadoop”），将文件hadoop-1.1.2的\src文件夹下的文件夹\core、\hdfs、\mapred复制到新建的 Java Project 的\src下

但是此时 Project 的目录结构是不对的，并且缺少 jar 包

右键 Project 名称，打开 Properties 选项卡，选择“Java Build Path”，选择“Source”，将下面的“Hadoop/src”整个 Remove，然后 Add Folder，添加Hadoop下的src下的core、hdfs、mapred，然后 OK

伪分布式：在一台机器上模拟出分布式环境

1 安装 VMware 或 VirtualBox

笔者很早就安装了 VMware 11

2 安装 CentOS

笔者从网上直接找了“VMware 专用 CentOS”，版本是 6.4，解压后直接用 VMware 打开即可
虚拟机的网络连接方式参见文章《Linux学习笔记（一）——Linux安装》第 5 小节，笔者在此使用的是 host-only 仅主机方式：