Cacti the image cache directory does not exist

尝试在Cacti中使用实时图形用法时遇到此错误？

The Image Cache Directory directory does not exist. Please first create it and set permissions and then attempt to open another realtime graph.

或者 ：

The Image Cache Directory is not writable. Please set permissions and then attempt to open another realtime graph.

确保正确设置了缓存路径目录和文件夹。
在Cacti WebUI中，导航至：

控制台>设置>其他>缓存目录

默认路径是：

/var/www/html/cache/

确保目录可写：

chmod 777 /var/www/html/cache/