Refine install docs (#5943)

* refine install docs

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* update

doc/getstarted/build_and_install/build_from_source_cn.rst

-从源码编译PaddlePaddle
+从源码编译
 ======================
 
 .. _build_step:
@@ -7,8 +7,11 @@
 ----------------
 
 PaddlePaddle主要使用 `CMake <https://cmake.org>`_ 以及GCC, G++作为编译工具。
-我们推荐您使用PaddlePaddle编译环境镜像完成编译，这样可以免去单独安装编译依赖的步骤，可选的不同编译环境
+我们推荐您使用PaddlePaddle Docker编译环境镜像完成编译，这样可以免去单独安装编译依赖的步骤，可选的不同编译环境Docker镜像
 可以在 `这里 <https://hub.docker.com/r/paddlepaddle/paddle_manylinux_devel/tags/>`_ 找到。
+
+如果您选择不使用Docker镜像，则需要在本机安装下面章节列出的 `编译依赖`_ 之后才能开始编译的步骤。
+
 编译PaddlePaddle，需要执行：
 
 .. code-block:: bash
@@ -22,7 +25,6 @@ PaddlePaddle主要使用 `CMake <https://cmake.org>`_ 以及GCC, G++作为编译
    cd build
    cmake -DWITH_GPU=OFF -DWITH_TESTING=OFF ..
    make
-   
 
 编译完成后会在build/python/dist目录下生成输出的whl包，可以选在在当前机器安装也可以拷贝到目标机器安装：
 
@@ -31,7 +33,33 @@ PaddlePaddle主要使用 `CMake <https://cmake.org>`_ 以及GCC, G++作为编译
    pip install python/dist/*.whl
 
 
-.. _build_step:
+.. _run_test:
+
+执行单元测试
+----------------
+
+如果您期望在编译完成后立即执行所有的单元测试，可以按照下面的方法：
+
+使用Docker的情况下，设置 :code:`RUN_TEST=ON` 和 :code:`WITH_TESTING=ON` 就会在完成编译之后，立即执行单元测试。
+开启 :code:`WITH_GPU=ON` 可以指定同时执行GPU上的单元测试。
+
+.. code-block:: bash
+
+   docker run -it -v $PWD:/paddle -e "WITH_GPU=OFF" -e "WITH_TESTING=ON" -e "RUN_TEST=ON" paddlepaddle/paddle_manylinux_devel:cuda8.0_cudnn5 bash -x paddle/scripts/docker/build.sh
+
+如果不使用Docker，可以执行ctest命令即可：
+
+.. code-block:: bash
+
+   mkdir build
+   cd build
+   cmake -DWITH_GPU=OFF -DWITH_TESTING=OFF ..
+   make
+   ctest
+   # 指定执行其中一个单元测试 test_mul_op
+   ctest -R test_mul_op
+
+.. _compile_deps:
 
 编译依赖
 ----------------

doc/getstarted/build_and_install/build_from_source_en.rst

-Build PaddlePaddle from Sources
+Build from Sources
 ==========================
 
 .. _build_step:
@@ -9,14 +9,18 @@ How To Build
 PaddlePaddle mainly uses `CMake <https://cmake.org>`_ and GCC, G++ as compile
 tools. We recommend you to use our pre-built Docker image to run the build
 to avoid installing dependencies by yourself. We have several build environment
-Docker images `here <https://hub.docker.com/r/paddlepaddle/paddle_manylinux_devel/tags/>`_.
+Docker images `here <https://hub.docker.com/r/paddlepaddle/paddle_manylinux_devel/tags/>`_ .
+
+If you choose not to use Docker image for your build, you need to install the
+below `Compile Dependencies`_ before run the build.
+
 Then run:
 
 .. code-block:: bash
 
    git clone https://github.com/PaddlePaddle/Paddle.git
    cd Paddle
-   # run the following command to build CPU-Only binaries if you are using docker
+   # run the following command to build a CPU-Only binaries if you are using docker
    docker run -it -v $PWD:/paddle -e "WITH_GPU=OFF" -e "WITH_TESTING=OFF" paddlepaddle/paddle_manylinux_devel:cuda8.0_cudnn5 bash -x paddle/scripts/docker/build.sh
    # else run these commands
    mkdir build
@@ -32,7 +36,35 @@ machine or copy it to the target machine.
 
    pip install python/dist/*.whl
 
-.. _build_step:
+
+.. _run_test:
+
+Run Tests
+----------------
+
+If you wish to run the tests, you may follow the below steps:
+
+When using Docker, set :code:`RUN_TEST=ON` and :code:`WITH_TESTING=ON` will run test immediately after the build.
+Set :code:`WITH_GPU=ON` Can also run tests on GPU.
+
+.. code-block:: bash
+
+   docker run -it -v $PWD:/paddle -e "WITH_GPU=OFF" -e "WITH_TESTING=ON" -e "RUN_TEST=ON" paddlepaddle/paddle_manylinux_devel:cuda8.0_cudnn5 bash -x paddle/scripts/docker/build.sh
+
+If you don't use Docker, just run ctest will start the tests:
+
+.. code-block:: bash
+
+   mkdir build
+   cd build
+   cmake -DWITH_GPU=OFF -DWITH_TESTING=ON ..
+   make
+   ctest
+   # run a single test like test_mul_op
+   ctest -R test_mul_op
+
+
+.. _compile_deps:
 
 Compile Dependencies
 ----------------

doc/getstarted/build_and_install/docker_install_cn.rst

-使用Docker安装运行PaddlePaddle
+使用Docker安装运行
 ================================
 
 使用Docker安装和运行PaddlePaddle可以无需考虑依赖环境即可运行。并且也可以在Windows的docker中运行。

doc/getstarted/build_and_install/docker_install_en.rst

-PaddlePaddle in Docker Containers
+Run in Docker Containers
 =================================
 
 Run PaddlePaddle in Docker container so that you don't need to care about

doc/getstarted/build_and_install/pip_install_cn.rst

-使用pip安装PaddlePaddle
+使用pip安装
 ================================
 
 PaddlePaddle可以使用常用的Python包管理工具

doc/getstarted/build_and_install/pip_install_en.rst

-Install PaddlePaddle Using pip
+Install Using pip
 ================================
 
 You can use current widely used Python package management

doc/howto/index_cn.rst

@@ -19,7 +19,6 @@
 ..  toctree::
   :maxdepth: 1
 
-  dev/build_cn.rst
   dev/write_docs_cn.rst
 
 模型配置

doc/howto/index_en.rst

@@ -18,7 +18,6 @@ Development
 ..  toctree::
   :maxdepth: 1
 
-  dev/build_en.rst
   dev/new_layer_en.rst
   dev/contribute_to_paddle_en.md