update docs

Signed-off-by: Nannie_wangli <annie.wangli@huawei.com>

en/device-dev/subsystems/subsys-testguide-envbuild.md

+
+
+# Setting Up the Environment
+## Basic Test Framework Environment
+
+|Environment|Operating System|Linux Extended Component|Python|Python Plug-ins|NFS Server|HDC|
+|------------|------------|------------|------------|------------|------------|------------|
+|Version|Ubuntu 18.04 or later|libreadline-dev|3.7.5 or later|pyserial 3.3 or later, paramiko 2.7.1 or later, setuptools 40.8.0 or later, and rsa4.0 or later|haneWIN NFS Server 1.2.50 or later, or NFS v4 or later|  1.1.0 or later|
+|Description|Provides code build environment.|Plug-in used to read commands.|Language used by the test framework.|pyserial: supports Python serial port communication. <br>paramiko: allows Python to use SSH. <br>setuptools: allows Python packages to be created and distributed easily. <br>rsa: implements RSA encryption in Python.|Enables devices to be connected through the serial port.| A tool that enables devices to be connected through the HarmonyOS Device Connector (HDC).|
+
+## Installation Process
+1. Run the following command to install the Linux extended component libreadline:
+    ```
+    sudo apt-get install libreadline-dev
+    ```
+    The installation is successful if the following information is displayed:
+    ```
+    Reading package lists... Done
+    Building dependency tree
+    Reading state information... Done
+    libreadline-dev is already the newest version (7.0-3).
+    0 upgraded, 0 newly installed, 0 to remove and 11 not upgraded.
+    ```
+2. Run the following command to install the setuptools plug-in:
+    ```
+    pip3 install setuptools
+    ```
+    The installation is successful if the following information is displayed:
+    ```
+    Requirement already satisfied: setuptools in d:\programs\python37\lib\site-packages (41.2.0)
+    ```
+3. Run the following command to install the paramiko plug-in:
+    ```
+    pip3 install paramiko
+    ```
+    The installation is successful if the following information is displayed:
+    ```
+    Installing collected packages: pycparser, cffi, pynacl, bcrypt, cryptography, paramiko
+    Successfully installed bcrypt-3.2.0 cffi-1.14.4 cryptography-3.3.1 paramiko-2.7.2 pycparser-2.20 pynacl-1.4.0
+    ```
+4. Run the following command to install the ras plug-in:
+    ```
+    pip3 install rsa
+    ```
+    The installation is successful if the following information is displayed:
+    ```
+    Installing collected packages: pyasn1, rsa
+    Successfully installed pyasn1-0.4.8 rsa-4.7
+    ```
+5. Run the following command to install the pyserial plug-in:
+    ```
+    pip3 install pyserial
+    ```
+    The installation is successful if the following information is displayed:
+    ```
+    Requirement already satisfied: pyserial in d:\programs\python37\lib\site-packages\pyserial-3.4-py3.7.egg (3.4)
+    ```
+6. Install the NFS server if the device outputs results only through the serial port.
+    - In Windows, install, for example, haneWIN NFS Server 1.2.50.
+    - In Linux, run the following command to install the NFS server:
+    ```
+    sudo apt install nfs-kernel-server
+    ```
+    The installation is successful if the following information is displayed:
+    ```
+    Reading package lists... Done
+    Building dependency tree
+    Reading state information... Done
+    nfs-kernel-server is already the newest version (1:1.3.4-2.1ubuntu5.3).
+    0 upgraded, 0 newly installed, 0 to remove and 11 not upgraded.
+    ```
+7. Install the HDC tool if the device supports HDC connections. For details about the installation process, see:
+
+    https://gitee.com/openharmony/developtools_hdc_standard/blob/master/README.md
+
+## Checking the Environment
+
+| Check Item|Operation|Requirements|
+| --- | --- | --- |
+| Check whether Python is installed successfully.|Run the **python --version** command.|The Python version is 3.7.5 or later.|
+| Check whether Python plug-ins are successfully installed.|Go to the **test/developertest** directory and run **run.bat** or **run.sh**.| The **>>>** prompt is displayed.|
+|Check the NFS server status (for the devices that support only serial port output).|Log in to the development board through the serial port and run the **mount** command to mount the NFS.|The file directory can be mounted.|
+|Check whether the HDC is successfully installed.|Run the **hdc_std -v** command.|The HDC version is 1.1.0 or later.|