centos下wordpress安裝主題後創建文章的特×××片無法顯示

centos下wordpress安裝主題後創建文章的特×××片無法顯示提示
Could not create the index.html file - to fix this create an empty file named index.html file in the cache directory.
Check inside your timthumb configuration file that the FILE_CACHE_DIRECTORY is pointing to a valid cache directory
解決方法：
1、在themes/主題/cache目錄下創建 index.html空文件 設置文件權限可讀寫
2、設置cache目錄權限可讀寫。