yum install ruby*
rpm -ivh rrdtool-1.4.4-1.wrl.src.rpm
相关文件下载：
http://www.express.org/~wrl/rrdtool/rrdtool-1.4.4-1.wrl.src.rpm
http://www.express.org/~wrl/rrdtool/rrdtool-1.4.4-1.el5.wrl.x86_64.rpm
http://www.express.org/~wrl/rrdtool/rrdtool-devel-1.4.4-1.el5.wrl.x86_64.rpm
http://www.express.org/~wrl/rrdtool/rrdtool-perl-1.4.4-1.el5.wrl.x86_64.rpm
http://www.express.org/~wrl/rrdtool/rrdtool-python-1.4.4-1.el5.wrl.x86_64.rpm
http://www.express.org/~wrl/rrdtool/rrdtool-python26-1.4.4-1.slc5.wrl.x86_64.rpm
http://www.express.org/~wrl/rrdtool/rrdtool-ruby-1.4.4-1.el5.wrl.x86_64.rpm
http://www.express.org/~wrl/rrdtool/rrdtool-tcl-1.4.4-1.el5.wrl.x86_64.rpm