GNUPLOT CentOS Installation

 First Install GD library 

https://drive.google.com/file/d/1ODi4ZS93tmooxt6Jd7ZDnEhuB9cz8vzG/view?usp=sharing

Then Install GNUPlot library

https://drive.google.com/file/d/1tbHqOIOc9k63tgfVkA0-rrHMEs3pdEEu/view?usp=sharing