安裝pnp前需要安裝rrdtool,用源代碼編譯安裝rrdtool時經常報很多錯，
具體解決辦法：
在安裝前
1.安裝glib
tar -zxf glib-2.15.4.tar.gz
./configure
make && make install
2.安裝libpng
cd libpng-1.2.18
./configure
make && make install
3.安裝pixman-0.10.0.tar.gz
cd pixman-0.10.0
./configure
make && make install
4.安裝pango-devel
yum install pango-devel
5 安裝libxml2 和libxml2-devel
yum -y install libxml2 libxml2-devel
make 編譯時會出現
Can’t locate extUtils/makemaker.pm
解決辦法：
yum -y install perl-CPAN