http://locahhost/wordpress的錯誤訊息,請求協助!!

http://localhost/phpinfo.php正常
http://localhost/phpmyadmin/ 也正常
phpinfo.php,phpmyadmin資料夾,wordpress資料夾,都在/var/www/html下,
但http://localhost/wordpress就出現下列訊息,敬請前輩指導如何修正,謝謝!!
Warning: require(/var/www/html/wordpress/wp-includes/load.php): failed to open stream: Permission denied in /var/www/html/wordpress/wp-settings.php on line 21 Fatal error: require(): Failed opening required ‘/var/www/html/wordpress/wp-includes/load.php’ (include_path=’.:/usr/share/pear:/usr/share/php’) in /var/www/html/wordpress/wp-settings.php on line 21