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开启加载Rewrite a2enmod rewrite 执行后，会提示OK和重启Apache命令（/etc/init.d/apache2 restart）。
To install PHP 5.6 or to upgrade from PHP 5.5 on Ubuntu 14: Enter the following commands in the order shown: apt-get -y update add-apt-repository ppa:ondrej/php apt-get -y install php5.6 php5.6-mcrypt...