php bin/magento 
Warning: putenv() has been disabled for security reasons in /www/wwwroot/richs.jpurse.com/vendor/symfony/console/Application.php on line 117#0 [internal function]: Magento\Framework\App\ErrorHandler->handler()
#1 /www/wwwroot/richs.jpurse.com/vendor/symfony/console/Application.php(117): putenv()
#2 /www/wwwroot/richs.jpurse.com/bin/magento(23): Symfony\Component\Console\Application->run()
#3 {main}

解决办法：

在php配置文件中。把这个函数putenv给开启。