linux rrdtool help create graph

I need some help with creating graphs using the rrdtool. I have never used it before. I installed by yum install rrdtool.

Basically I have a txt file with these values

432
542
234
531
1004

Does anyone know the syntax of rrdtool to automatically take the values from the txt file and create a graph in an html page?

RRDtool isn't a graph generator. It's (primary) use is for tracking values over time. Output of those into shiny graphs is just a nice added feature.
RRDtool Tutorials
RRDtool Documentation (those should be available as man pages)