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[#]: collector: (lujun9972)
[#]: translator: (lxbwolf)
[#]: reviewer: ( )
[#]: publisher: ( )
[#]: url: ( )
[#]: subject: (Build a private social network with a Raspberry Pi)
[#]: via: (https://opensource.com/article/20/3/raspberry-pi-open-source-social)
[#]: author: (Giuseppe Cassibba https://opensource.com/users/peppe8o)
Build a private social network with a Raspberry Pi
======
Step-by-step instructions on how to create your own social network with
low-cost hardware and simple setup.
![Team of people around the world][1]
Social networks have revolutionized people's lives in the last several years. People use social channels every day to stay connected with friends and family. But a common question remains regarding privacy and data security. Even if social networks have created complex privacy policies to protect users, maintaining your data in your own server is always the best option if you don't want to make them available to the public.
Again, a Raspberry Pi—Raspbian Lite version can be very versatile to help you put a number of useful home services (see also my [Raspberry Pi projects][2] article) in place. Some addictive features can be achieved by searching for open source software and testing it with this fantastic device. An interesting example to try is installing OpenSource Social Network in your Raspberry Pi.
### What Is OpenSource Social Network?
[OpenSource Social Network][3] (OSSN) is a rapid-development social networking software written in PHP, that essentially allows you to make a social networking website. OSSN can be used to build different types of social apps, such as:
* Private Intranets
* Public/Open Networks
* Community
OSSN supports features like:
* Photos
* Profile
* Friends
* Smileys
* Search
* Chat
OSSN runs on a LAMP server. It has very poor hardware requirements, but an amazing user interface, which is also mobile-friendly.
### What we need
This project is very simple and, because we're installing only remote web services, we only need a few cheap parts. I'm going to use a Raspberry Pi 3 model B+, but it should also work with Raspberry Pi 3 model A+ or newer boards.
Hardware:
* Raspberry Pi 3 model B+ with its power supply
* a micro SD card (better if it is a performing card, at least 16GB)
* a Desktop PC with an SFTP software (for example, the free [Filezilla][4]) to transfer installation packages into your RPI.
### Step-by-step procedure
We'll start by setting up a classic LAMP server. We'll then set up database users and install OpenSource Social Network.
#### 1\. Install Raspbian Buster Lite OS
For this step, you can simply follow my [Install Raspbian Buster Lite in your Raspberry Pi][5] article.
Make sure that your system is up to date. Connect via ssh terminal and type following commands:
```
sudo apt-get update
sudo apt-get upgrade
```
2\. Install LAMP server
LAMP (Linux–Apache–Mysql–Php) servers usually come with the MySQL database. In our project, we'll use MariaDB instead, because it is lighter and works with Raspberry Pi. 
#### 3\. Install Apache server:
```
`sudo apt-get install apache2 -y`
```
You should now be able to check that Apache installation has gone correctly by browsing http://<<YouRpiIPAddress>>:
![][6]
#### 4\. Install PHP:
```
`sudo apt-get install php -y`
```
5\. Install MariaDB server and PHP connector:
```
`sudo apt-get install mariadb-server php-mysql -y`
```
6\. Install PhpMyAdmin:
PhpMyAdmin is not mandatory in OpenSource Social Network, but I suggest that you install it because it simplifies database management.
```
`sudo apt-get install phpmyadmin`
```
In the phpMyAdmin setup screen, take the following steps:
* Select apache (mandatory) with space and press OK.
* Select Yes to configure the database for phpMyAdmin with dbconfig-common.
* Enter your favorite phpMyAdmin password and press OK.
* Enter your phpMyAdmin password again to confirm and press OK
#### 7\. Grant phpMyAdmin user DB privileges to manage DBs:
We'll connect to MariaDB with root user (default password is empty) to grant permissions. Remember to use semicolons at the end of each command row as shown below:
```
sudo mysql -uroot -p
grant all privileges on *.* to 'phpmyadmin'@'localhost';
flush privileges;
quit
```
8\. Finally, restart Apache service:
```
`sudo systemctl restart apache2.service`
```
And check that phpMyAdmin is working by browsing http://<<YouRpiIPAddress>>/phpmyadmin/. 
![][7]
Default phpMyAdmin login credentials are:
* user: phpmyadmin
* password: the one you set up in the phpMyAdmin installation step
### Installing other open source social network-required packages and setting up PHP
We need to prepare our system for OpenSource Social Network's first setup wizard. Required packages are:
* PHP version any of 5.6, 7.0, 7.1
* MYSQL 5 OR >
* APACHE
* MOD_REWRITE
* PHP Extensions cURL & Mcrypt should be enabled
* PHP GD Extension
* PHP ZIP Extension
* PHP settings allow_url_fopen enabled
* PHP JSON Support
* PHP XML Support
* PHP OpenSSL
So we'll install them with following terminal commands:
```
`sudo apt-get install php7.3-curl php7.3-gd php7.3-zip php7.3-json php7.3-xml`
```
#### 1\. Enable MOD_REWRITE:
```
`sudo a2enmod rewrite`
```
2\. Edit default Apache config to use mod_rewrite:
```
`sudo nano /etc/apache2/sites-available/000-default.conf`
```
3\. Add the section so that your **000-default.conf** file appears like the following (excluding comments):
```
<VirtualHost *:80>
    ServerAdmin webmaster@localhost
    DocumentRoot /var/www/html
    ErrorLog ${APACHE_LOG_DIR}/error.log
    CustomLog ${APACHE_LOG_DIR}/access.log combined
    # SECTION TO ADD --------------------------------
        <Directory /var/www/html>
            Options Indexes FollowSymLinks MultiViews
            AllowOverride All
            Require all granted
        </Directory>
    # END SECTION TO ADD --------------------------------
</VirtualHost>
```
4\. Install Mcrypt:
```
sudo apt install php-dev libmcrypt-dev php-pear
sudo pecl channel-update pecl.php.net
sudo pecl install mcrypt-1.0.2
```
5\. Enable Mcrypt module by adding (or uncommenting) “extension=mcrypt.so" in "/etc/php/7.3/apache2/php.ini":
```
`sudo nano /etc/php/7.3/apache2/php.ini`
```
**allow_url_fopen** should be already enabled in "/etc/php/7.3/apache2/php.ini". OpenSSL should be already installed in php7.3.
#### 6\. Another setting that I suggest is editing the PHP max upload file size up to 16 MB:
```
`sudo nano /etc/php/7.3/apache2/php.ini`
```
7\. Look for the row with the **upload_max_filesize** parameter and set it as the following:
```
`upload_max_filesize = 16M`
```
8\. Save and exit. Restart Apache:
```
`sudo systemctl restart apache2.service`
```
### Install OSSN
#### 1\. Create DB and set up user:
Go back to phpmyadmin web page (browse "http://<<YourRpiIPAddress>>/phpmyadmin/") and login:
User: phpmyadmin
Password: the one set up in phpmyadmin installation step
Click on database tab:
![][8]
Create a database and take note of the database name, as you will be required to enter it later in the installation process.
![][9]
It's time to create a database user for OSSN. In this example, I'll use the following credentials:
User: ossn_db_user
Password: ossn_db_password
So, terminal commands will be (root password is still empty, if not changed by you before):
```
sudo mysql -uroot -p
CREATE USER 'ossn_db_user'@'localhost' IDENTIFIED BY 'ossn_db_password';
GRANT ALL PRIVILEGES ON ossn_db.* TO 'ossn_db_user'@'localhost';
flush privileges;
quit
```
2\. Install OSSN software:
Download the OSSN installation zip file from the [OSSN download page][10] on your local PC. At the time of this writing, this file is named "ossn-v5.2-1577836800.zip."
Using your favorite SFTP software, transfer the entire zip file via SFTP to a new folder in the path "/home/pi/download" on your Raspberry Pi. Common (default) SFP connection parameters are:
* Host: your Raspberry Pi IP address
* User: pi
* Password: raspberry (if you didn't change the pi default password)
* Port: 22
Back to terminal:
```
cd /home/pi/download/ #Enter directory where OSSN installation files have been transferred
unzip ossn-v5.2-1577836800.zip #Extracts all files from zip
cd /var/www/html/ #Enter Apache web directory
sudo rm index.html #Removes Apache default page - we'll use OSSN one
sudo cp -R /home/pi/download/ossn-v5.2-1577836800/* ./ #Copy installation files to web directory
sudo chown -R www-data:www-data ./
```
Create a data folder:OSSN requires a folder to store data. OSSN suggests, for security reasons, to create this folder outside of the published document root. So, we'll create this opt-in folder and give grants:
```
sudo mkdir /opt/ossn_data
sudo chown -R www-data:www-data /opt/ossn_data/
```
Browse http://<<YourRpiIPAddress>> to start the installation wizard:
![][11]
All checks should be fine. Click the Next button at the end of the page.
![][12]
Read the license validation and click the Next button at the end of the page to accept.
![][13]
Enter the database user, password, and the DB name you chose. Remember also to enter the OSSN data folder. Press Install.
![][14]
Enter your admin account information and press the Create button.
![][15]
Everything should be fine now. Press Finish to access the administration dashboard.
![][16]
So, administration panel can be reached with URL "http://<<YourRpiIPAddress>>/administrator" while user link will be "http://<<YourRpiIPAddress>>".
![][17]
_This article was originally published at [peppe8o.com][18]. Reposted with permission._
--------------------------------------------------------------------------------
via: https://opensource.com/article/20/3/raspberry-pi-open-source-social
作者：[Giuseppe Cassibba][a]
选题：[lujun9972][b]
译者：[译者ID](https://github.com/译者ID)
校对：[校对者ID](https://github.com/校对者ID)
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
[a]: https://opensource.com/users/peppe8o
[b]: https://github.com/lujun9972
[1]: https://opensource.com/sites/default/files/styles/image-full-size/public/lead-images/team_global_people_gis_location.png?itok=Rl2IKo12 (Team of people around the world)
[2]: https://peppe8o.com/2019/04/best-raspberry-pi-projects-with-open-source-software/
[3]: https://www.opensource-socialnetwork.org/
[4]: https://filezilla-project.org/
[5]: https://peppe8o.com/2019/07/install-raspbian-buster-lite-in-your-raspberry-pi/
[6]: https://opensource.com/sites/default/files/uploads/ossn_1_0.jpg
[7]: https://opensource.com/sites/default/files/uploads/ossn_2.jpg
[8]: https://opensource.com/sites/default/files/uploads/ossn_3.jpg
[9]: https://opensource.com/sites/default/files/uploads/ossn_4.jpg
[10]: https://www.opensource-socialnetwork.org/download
[11]: https://opensource.com/sites/default/files/uploads/ossn_5.jpg
[12]: https://opensource.com/sites/default/files/uploads/ossn_6.jpg
[13]: https://opensource.com/sites/default/files/uploads/ossn_7.jpg
[14]: https://opensource.com/sites/default/files/uploads/ossn_8.jpg
[15]: https://opensource.com/sites/default/files/uploads/ossn_9.jpg
[16]: https://opensource.com/sites/default/files/uploads/ossn_10.jpg
[17]: https://opensource.com/sites/default/files/uploads/ossn_11.jpg
[18]: https://peppe8o.com/private-social-network-with-raspberry-pi-and-opensource-social-network/

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[#]: collector: (lujun9972)
[#]: translator: (lxbwolf)
[#]: reviewer: ( )
[#]: publisher: ( )
[#]: url: ( )
[#]: subject: (Build a private social network with a Raspberry Pi)
[#]: via: (https://opensource.com/article/20/3/raspberry-pi-open-source-social)
[#]: author: (Giuseppe Cassibba https://opensource.com/users/peppe8o)
用树莓派搭建一个私人社交网络
======
手把手教你怎样以低硬件成本和简易步骤搭建自己的社交网络。
![Team of people around the world][1]
近年来，社交网络已经革新了人们的生活习惯。为了维持与朋友和家人的联系，人们每天都会使用社交频道。但是涉及到隐私和数据安全时，仍有一些普遍问题。尽管社交网络创建了复杂的隐私策略来保护用户的信息，但如果你不想自己的信息被泄露，最好的办法还是把数据保存在自己的服务器上。
一个树莓派 — 多才多艺的 Raspbian Lite 版本就可以让你搭建很多有用的家庭服务（参照我的文章[树莓派项目][2]）。通过搜索开源软件你就可以实现一些令人痴迷的功能，你也可以用这个神奇的设备来感受那些功能。其中一个有趣的尝试就是在你的树莓派上安装 OSSN（译注：OpenSource Social Network）。
### OSSN是什么？
[OSSN][3] 是用 PHP 写的一个快速开发社交网络软件，让你可以搭建自己的社交网站。OSSN 可以用来搭建不同类型的社交应用，如：
* 私人内部网
* 公用/公开网络
* 社区
OSSN 支持的功能：
* 照片
* 个人资料
* 朋友圈
* 表情
* 搜索
* 聊天
OSSN 运行在 LAMP 服务器上。硬件需求很简单，却能提供强大的用户界面，也友好支持移动端。
### 我们需要准备什么
这个项目很简单，而且由于我们只安装远程 web 服务，因此我们只需要一些便宜的零件就够了。我使用的是树莓派 3B+，但是用树莓派 3A+ 或其他更新的板应该也可以。
硬件：
* 带有电源模块的树莓派 3B+
* 一张 SD 卡（最好是性能好点的卡，至少 16 GB）
* 一台有 SFTP 软件（如免费的 [Filezilla][4]）的桌面 PC，用来把安装包传到你的树莓派上
### 操作步骤
我们首先搭建一个传统的 LAMP 服务器，然后配置数据库用户和安装 OSSN。
#### 1\. 安装 Raspbian Buster Lite 操作系统
你可以直接参照我的文章[在你的树莓派上安装 Raspbian Buster Lite][5]。
为了确保你的系统是最新的，ssh 登录到树莓派后在终端输入下面的命令：
```bash
sudo apt-get update
sudo apt-get upgrade
```
#### 2\. 安装 LAMP 服务
LAMP（Linux–Apache–Mysql–Php）服务通常与 MySQL 数据库配合。在我们的项目中，我们选择 MariaDB，因为它更轻量，完美支持树莓派。
#### 3\. 安装 Apache 服务:
```
`sudo apt-get install apache2 -y`
```
你可以通过在浏览器输入 `http://<<YouRpiIPAddress>>` 来检查 Apache 是否安装正确：
![][6]
#### 4\. 安装 PHP:
```
`sudo apt-get install php -y`
```
#### 5\. 安装 MariaDB 服务和 PHP connector:
```
`sudo apt-get install mariadb-server php-mysql -y`
```
#### 6\. 安装 phpMyAdmin:
在 OSSN 中 phpMyAdmin 不是强制安装的，但我建议你安装，因为它可以简化数据库的管理。
```
`sudo apt-get install phpmyadmin`
```
在 phpMyAdmin 配置界面，执行以下步骤：
* 按下空格和 OK 选择 apache（强制）。
* 在 dbconfig-common 选择是，配置 phpMyAdmin 的数据库。
* 输入想设置的密码，按下 OK。
* 再次输入 phpMyAdmin 密码来确认，按下 OK。
#### 7\. 为 phpMyAdmin 用户添加数据库权限来管理数据库：
我们用 root 用户连接 MariaDB（默认没有密码）来设置权限。
```
sudo mysql -uroot -p
grant all privileges on *.* to 'phpmyadmin'@'localhost';
flush privileges;
quit
```
#### 8\. 最后，重启 Apache 服务:
```
`sudo systemctl restart apache2.service`
```
在浏览器输入 `http://<<YouRpiIPAddress>>/phpmyadmin/` 来检查 phpMyAdmin 是否正常：
![][7]
默认的 phpMyAdmin 登录凭证：
* 用户名：phpmyadmin
* 密码：在 phpMyAdmin 安装步骤中你设置的密码
### 安装 OSSN 所需的其他包和配置 PHP
在第一次配置 OSSN 前，我们还需要在系统上安装一些所需的包：
* PHP 版本 5.6，7.0 或 7.1
* MYSQL 5 及以上
* APACHE
* MOD_REWRITE
* 需要打开 PHP 扩展 cURL 和 Mcrypt
* PHP GD 扩展
* PHP ZIP 扩展
* 打开 PHP 设置 allow_url_fopen
* PHP JSON 支持
* PHP XML 支持
* PHP OpenSSL
在终端输入以下命令来安装上述包：
```
`sudo apt-get install php7.3-curl php7.3-gd php7.3-zip php7.3-json php7.3-xml`
```
#### 1\. 打开 MOD_REWRITE:
```
`sudo a2enmod rewrite`
```
#### 2\. 修改默认的 Apache 配置，使用 mod_rewrite:
```
`sudo nano /etc/apache2/sites-available/000-default.conf`
```
#### 3\. 在 **000-default.conf** 文件中添加下面的内容：
```ini
<VirtualHost *:80>
ServerAdmin webmaster@localhost
DocumentRoot /var/www/html
ErrorLog ${APACHE_LOG_DIR}/error.log
CustomLog ${APACHE_LOG_DIR}/access.log combined
# SECTION TO ADD --------------------------------
<Directory /var/www/html>
Options Indexes FollowSymLinks MultiViews
AllowOverride All
Require all granted
</Directory>
# END SECTION TO ADD --------------------------------
</VirtualHost>
```
#### 4\. 安装 Mcrypt:
```bash
sudo apt install php-dev libmcrypt-dev php-pear
sudo pecl channel-update pecl.php.net
sudo pecl install mcrypt-1.0.2
```
#### 5\. 在 `/etc/php/7.3/apache2/php.ini` 文件中添加 `extension=mcrypt.so`（或取消注释）打开 Mcrypt 模块：
```bash
sudo nano /etc/php/7.3/apache2/php.ini
```
**allow_url_fopen** 应该已经在 `/etc/php/7.3/apache2/php.ini` 文件中打开了。OpenSSL 应该在 php7.3 中安装了。
#### 6\. 我建议的另一个设置是把 PHP 最大上传文件数修改为 16 MB：
```
`sudo nano /etc/php/7.3/apache2/php.ini`
```
#### 7\. 搜索到 **upload_max_filesize** 所在的行，参照下面的设置：
```
`upload_max_filesize = 16M`
```
#### 8\. 保存并退出，重启 Apache：
```
`sudo systemctl restart apache2.service`
```
### 安装 OSSN
#### 1\. 创建数据库，设置用户：
回到 phpmyadmin web页面（浏览器输入 `http://<<YouRpiIPAddress>>/phpmyadmin/`）并登录：
用户名： phpmyadmin
密码：在 phpMyAdmin 安装步骤中你设置的密码
点击数据库标签页：
![][8]
创建一个数据库，记下数据库的名字，因为在之后的安装过程中，你要手动输入它。
![][9]
现在为 OSSN 创建一个数据库用户，我使用下面的凭证：
用户名： ossn_db_user
密码： ossn_db_password
在终端输入下面的命令（如果你没有修改过密码，root 密码应该仍然是空）：
```bash
sudo mysql -uroot -p
CREATE USER 'ossn_db_user'@'localhost' IDENTIFIED BY 'ossn_db_password';
GRANT ALL PRIVILEGES ON ossn_db.* TO 'ossn_db_user'@'localhost';
flush privileges;
quit
```
#### 2\. 安装 OSSN 软件:
在你 PC 上从 [OSSN 下载页面][10] 下载 OSSN 安装压缩文件，保存为文件 `ossn-v5.2-1577836800.zip`。
使用你习惯的 SFTP 软件把整个压缩文件通过 SFTP 传到树莓派的新目录 `/home/pi/download` 下。常用的（默认）SFP 连接参数是：
* 主机：你树莓派的 IP 地址
* 用户名：pi
* 密码：raspberry（如果没有修改过默认密码）
* 端口： 22
在终端输入：
```bash
cd /home/pi/download/ #Enter directory where OSSN installation files have been transferred
unzip ossn-v5.2-1577836800.zip #Extracts all files from zip
cd /var/www/html/ #Enter Apache web directory
sudo rm index.html #Removes Apache default page - we'll use OSSN one
sudo cp -R /home/pi/download/ossn-v5.2-1577836800/* ./ #Copy installation files to web directory
sudo chown -R www-data:www-data ./
```
创建数据文件夹：OSSN 需要一个文件夹来存放数据。出于安全目的，OSSN 建议这个文件夹创建在公开文档根目录之外。所以，我们在 `/opt` 下创建。
```bash
sudo mkdir /opt/ossn_data
sudo chown -R www-data:www-data /opt/ossn_data/
```
在浏览器输入 `http://<<YourRpiIPAddress>>` 来开始安装向导。
![][11]
所有项都检查完后，点击页面最下面的下一步按钮。
![][12]
阅读证书验证并点击页面最下面的下一步按钮来接受证书。
![][13]
输入数据库用户名，密码和你选择的数据库名字，记得也要输入 OSSN 数据文件夹名称。点击安装。
![][14]
输入你的管理员账号信息，点击创建按钮。
![][15]
现在所有的工作应该都完成了。点击结束，进入管理员首页。
![][16]
你可以通过 URL `http://<<YourRpiIPAddress>>/administrator` 进入管理员控制面板，普通用户可以访问链接是 `http://<<YourRpiIPAddress>>`。
![][17]
*本文首发在 [peppe8o.com][18]。已获得转载授权。*
--------------------------------------------------------------------------------
via: https://opensource.com/article/20/3/raspberry-pi-open-source-social
作者：[Giuseppe Cassibba][a]
选题：[lujun9972][b]
译者：[lxbwolf](https://github.com/lxbwolf)
校对：[校对者ID](https://github.com/校对者ID)
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
[a]: https://opensource.com/users/peppe8o
[b]: https://github.com/lujun9972
[1]: https://opensource.com/sites/default/files/styles/image-full-size/public/lead-images/team_global_people_gis_location.png?itok=Rl2IKo12 (Team of people around the world)
[2]: https://peppe8o.com/2019/04/best-raspberry-pi-projects-with-open-source-software/
[3]: https://www.opensource-socialnetwork.org/
[4]: https://filezilla-project.org/
[5]: https://peppe8o.com/2019/07/install-raspbian-buster-lite-in-your-raspberry-pi/
[6]: https://opensource.com/sites/default/files/uploads/ossn_1_0.jpg
[7]: https://opensource.com/sites/default/files/uploads/ossn_2.jpg
[8]: https://opensource.com/sites/default/files/uploads/ossn_3.jpg
[9]: https://opensource.com/sites/default/files/uploads/ossn_4.jpg
[10]: https://www.opensource-socialnetwork.org/download
[11]: https://opensource.com/sites/default/files/uploads/ossn_5.jpg
[12]: https://opensource.com/sites/default/files/uploads/ossn_6.jpg
[13]: https://opensource.com/sites/default/files/uploads/ossn_7.jpg
[14]: https://opensource.com/sites/default/files/uploads/ossn_8.jpg
[15]: https://opensource.com/sites/default/files/uploads/ossn_9.jpg
[16]: https://opensource.com/sites/default/files/uploads/ossn_10.jpg
[17]: https://opensource.com/sites/default/files/uploads/ossn_11.jpg
[18]: https://peppe8o.com/private-social-network-with-raspberry-pi-and-opensource-social-network/