我想使用 yum 命令(Red Hat Enterprise Linux 版本 5)安装 java,但出现异常..
$ yum install java-1.6.0-openjdk
Loading "rhnplugin" plugin
Loading "security" plugin
Loading "installonlyn" plugin
**This system is not registered with RHN.**
RHN support will be disabled.
请帮助我是新的 linux ..