感谢老兄拔刀相助！可是问题还没有解决：
图片是有的，名字类似：172.17.2.1_1_day.png.
172.17.2.1_1_month.png.
问题是图片不更新，不能自动绘出流量图！
当我运行了./configure命令时显示：
checking for gdImageGif in -lgd... no
checking for gdImagePng in -lgd... no
checking for gdImagePng_jpg in -lgd... no
checking for gdImagePng_jpg_ft in -lgd... no
checking for gdImageGd in -lgd... no
checking gd.h usability... no
checking gd.h presence... no
checking for gd.h... no
** Ooops, one of many bad things happened:
a) You don't have the GD library installed.
Get it from
http://www.boutell.com, compile it and
use either --with-gd-lib=DIR and --with-gd-inc=DIR to specify
its location. You might also have to use --with-z-inc,
--with-z-lib and --with-png-inc, --with-png-lib for gd
versions 1.6 and higher. Check config.log for more
information on the problem.
b) You have the GD library installed, but not the gd.h
header file. Download the source (see above) and use
--with-gd-inc=DIR to specify where the file can be found.
c) You have the library and the header file installed, but
you also have a shared GD library in the same directory.
Remove the shared library files and/or links (e.g.
libgd.so.2.0.0, libgd.so and libgd.so.2). This is especially
likely if you're using a recent (post 1.8.4) version of GD
and didn't configure it with --disable-shared.
这不是Linux自带的GD有问题吗？
这个到底怎么弄啊？
谢谢，帮忙帮到底吧。
