举例子：
安装 libGL-devel
1、
yum list libGL-devel
居然说没有匹配的包的信息...
[root@CentOS6 ~]# yum list libGL-devel
Loaded plugins: fastestmirror, refresh-packagekit, security
Loading mirror speeds from cached hostfile
* base: mirrors.opencas.cn
* extras: mirrors.sina.cn
* updates: mirrors.sina.cn
Error: No matching Packages to list
[root@CentOS6 ~]#
2、