Magento2 Requirements

Operating System :Linux x86-64

Web Server:
Apache 2.2 or 2.4      The apache mod_rewrite module must be enabled. To
                                   learn more, see: Apache.
Nginx 1.8.x                 (or latest mainline version)

PHP:
7.0.4                    Magento 2.1.2 and later only.
7.0.2 ,
7.0.6 to 7.1.0       Magento 2.1.x (all versions)
5.6.5 and later     Magento 2.1.2
5.6.x                     Magento 2.1.0 and 2.1.1
Not Supported:
PHP 7.1, 5.4         Not Supported
PHP 7.0.5             Known issue that affects code compiler.

Additional configuration:
memory_limit minimum 512 MB

Database:
MySQL 5.7or 5.6.x