Originally Posted by JRink
If I run "./configure", then i get this error, "configure: error: Unable to find RRD at /usr/local/rrdtool: please use --with-rrd-home=DIR"
but I have NO /usr/local/rrdtool file, but I did find a /usr/bin/rrdtool file.
For some reason the ntop configuration looks for rrdtool under /usr/local, but since you have the executable rrdtool in /usr/bin, most likely you have rrdtool already installed and it's located under /usr.
But this is not enough. To compile a package which depends on rrdtool, you need the rrdtool's development package, which contains all the necessary libraries and headers files.
So: 1) check if you actually have rrdtool and rrdtool-devel installed
rpm -qa | grep rrdtool
2) eventually install the rrdtool development package
yum install rrdtool-devel
3) Then try to configure ntop again, eventually by passing the option
as suggested by the error message.