碰到服务没有安装yum
wget http://yum.baseurl.org/download/3.2/yum-3.2.28.tar.gztar xvf yum-3.2.28.tar.gz
touch /etc/yum.conf
cd yum-3.2.28yummain.py install yum
yum check-updateyum updateyum clean all
安装yum
原文：http://www.cnblogs.com/jay--zhang/p/7099993.html
