X2CRM（https://www.x2crm.com/）是开源的CRM应用，使用PHP开发。源代码：https://github.com/X2Engine/X2CRM。
X2CRM is a next-generation, open source social sales application for small and medium sized businesses. X2CRM was designed to streamline contact and sales actions into one compact blog-style user interface. Add to this contact and colleague social feeds and sales representatives become smarter and more effective resulting in increased sales and higher customer satisfaction.
需要安装的软件：
Apache Web服务
PHP5.3+
MySQL 5+
Ubuntu安装X2CRM：
1.安装MariaDB
为X2CRM创建一个数据库：
$ sudo mysql -u root -p
MariaDB [(none)]> CREATE DATABASE x2crm;
MariaDB [(none)]> GRANT ALL PRIVILEGES ON x2crm.* TO 'x2crm'@'localhost' IDENTIFIED BY 'test1234';
MariaDB [(none)]> FLUSH PRIVILEGES;
MariaDB [(none)]> \q
上面的SQL语句创建了一个x2crm数据库和x2crm用户（密码test1234）。
2.安装Apache
$ sudo apt-get install apache2
3.安装PHP和PHP模块
$ sudo apt-get install php7.0 libapache2-mod-php7.0 php7.0-mbstring php7.0-curl php7.0-zip php7.0-gd php7.0-mysql php7.0-mcrypt
4.下载X2CRM源码
$ cd /tmp
$ wget https://github.com/X2Engine/X2Engine/archive/master.zip
$ sudo unzip master.zip
$ sudo mv X2CRM-master/x2engine/ /var/www/html/x2crm
更改目录权限：
$ sudo chown www-data:www-data -R /var/www/html/x2crm
5.配置Apache
开启Apache rewrite模块：
$ sudo a2enmod rewrite
创建Virtual Host：
$ sudo vim /etc/apache2/sites-available/x2crm.conf
写入内容：
<VirtualHost *:80>
ServerAdmin admin@yourdomain.com
DocumentRoot /var/www/html/x2crm/
ServerName your_domain_or_IP
ServerAlias www.your_domain.com
<Directory /var/www/html/x2crm/>
Options FollowSymLinks
AllowOverride All
Order allow,deny
allow from all
</Directory>
ErrorLog /var/log/apache2/your-domain.com-error_log
CustomLog /var/log/apache2/your-domain.com-access_log common
</VirtualHost>
注意替换上面的域名。
使配置生效：
$ sudo ln -s /etc/apache2/sites-available/x2crm.conf /etc/apache2/sites-enabled/x2crm.conf
重启Apache服务：
$ sudo systemctl restart apache2
6.完成安装
使用浏览器访问：http://your_domain_or_IP，根据提示完成安装。