centos7虚拟机更新系统库出现：
错误：软件包：glibc-headers-2.17-222.el7.x86_64 (base)
需要：kernel-headers
错误：软件包：glibc-headers-2.17-222.el7.x86_64 (base)
需要：kernel-headers >= 2.2.1
解决办法：
wget http://vault.centos.org/5.7/os/x86_64/CentOS/kernel-headers-2.6.18-274.el5.x86_64.rpm
rpm -ivh kernel-headers-2.6.18-274.el5.x86_64.rpm