wget用来从互联网上下载东西的，
wget http://mirror.centos.org/centos/6.5/os/x86_64/Packages/python-iniparse-0.3.1-2.1.el6.noarch.rpm
指定下载路径：用-P 比如指定下载到/home/cx下
wget -P /home/cx
http://mirror.centos.org/centos/6.5/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.30-14.el6.noarch.rpm