# Preparations<a name="EN-US_TOPIC_0000001071315859"></a>

-   [Linux Server](#section20979554791)
-   [Node.js](#section9954105413153)
-   [HPM](#section15937194904819)
-   [Python Environment](#section1621819180417)
-   [File Packaging Tool](#section77617165913)
-   [SCons](#section20558439191516)

## Linux Server<a name="section20979554791"></a>

Prepare a 64-bit Linux server running Ubuntu 16.04 or later. HPM supports Windows Server, but the open-source Hi3861, Hi3516, and Hi3518 solutions support only Ubuntu.

Configure Ubuntu to use bash as the Linux system shell, by performing the following:

```
ls -l $(which sh)
# If the file does not point to bash, modify the file using either of the provided methods.
# Method 1: Run the following command and select no:
dpkg-reconfigure dash
# Method 2: Run the following commands to delete /bin/sh and then create a new symbolic link to bash:
rm -f /bin/sh
ln -s bash /bin/sh
```

## Node.js<a name="section9954105413153"></a>

>![](public_sys-resources/icon-note.gif) **NOTE:** 
>If the Node.js version of the source is outdated, run the following command before running  **apt-get install**:
>```
>curl -L https://deb.nodesource.com/setup_12.x | bash
>```

You are advised to install Node.js 12.x \(including npm 6.14.4\) or a later version \(12.13.0 or later is recommended\).

```
sudo apt-get install nodejs
sudo apt-get install npm
```

Run the following commands to view Node.js and NPM versions:

```
node --version  # Check the Node.js version.
npm --version   # Check the NPM version.
```

## HPM<a name="section15937194904819"></a>

Install the  **hpm-cli**  command line tool by using the NPM \(default source: https://registry.npmjs.org/\) provided by the Node.js.

```
npm install -g @ohos/hpm-cli
```

After  **hpm-cli**  is installed, run the following command to view default HPM configurations:

```
hpm config
```

You can modify the default configurations as required. The following lists common HPM configurations:

```
registry = https://hpm.harmonyos.com              # Register with the HPM registration center. This is mandatory for downloading components.
strictSsl = true                                  # Enable strict SSL verification as HTTPS is used for connection.
http_proxy = http://your-proxy-server:port        # Configure the HTTP proxy.
https_proxy = http://your-proxy-server:port       # Configure the HTTPS proxy.
```

For details about  **hpm-cli**  commands, see  [HPM Commands](bundle-management.md).

## Python Environment<a name="section1621819180417"></a>

Run the following commands to install Python later than 3.7:

```
sudo apt-get install python3.8
sudo apt-get install python3-pip
sudo pip3 install setuptools
sudo pip3 install kconfiglib  # Install kconfiglib 13.2.0 or later.
```

>![](public_sys-resources/icon-note.gif) **NOTE:** 
>The preceding method is applicable to Hi3518 and Hi3516 platforms. For Hi3861, run the following commands to install the Python environment:
>```
>sudo apt-get install python3.8
>sudo apt-get install python3-pip
>sudo pip3 install setuptools
>sudo pip3 install kconfiglib  # Install kconfiglib 13.2.0 or later.
>sudo pip3 install pycryptodome
>sudo pip3 install six --upgrade --ignore-installed six
>sudo pip3 install ecdsa
>```

If both Python2 and Python3 have been installed in the current system, run the following commands to set the default Python to Python3:

```
ll `which python`
rm /usr/bin/python
ln -s python3.8 /usr/bin/python
```

## File Packaging Tool<a name="section77617165913"></a>

Run the following commands to install the tool:

```
which mkfs.vfat  # If mkfs.vfat is not found, run the following command:
sudo apt-get install dosfstools
which mcopy # If mcopy is not found, run the following command:
sudo apt-get install mtools
```

>![](public_sys-resources/icon-note.gif) **NOTE:** 
>Both Hi3518 and Hi3516 platforms require the file packaging tool. For Hi3861, the tool is not required.

## SCons<a name="section20558439191516"></a>

1.  Start a Linux server.
2.  Run the following command to install the SCons installation package:

    ```
    python3 -m pip install scons
    ```

3.  Run the following command to check whether SCons is successfully installed. If the installation is successful, the query result as shown in  [Figure 1](#fig235815252492)  is displayed.

    ```
    scons -v
    ```

    **Figure  1**  Successful installation \(SCons version requirement: 3.0.4 or later\)<a name="fig235815252492"></a>  
    ![](figures/successful-installation-(scons-version-requirement-3-0-4-or-later).png "successful-installation-(scons-version-requirement-3-0-4-or-later)")


>![](public_sys-resources/icon-note.gif) **NOTE:** 
>SCons is required for the Hi3861 platform, but not for the Hi3518 or Hi3516 platform.