Loaded plugins: fastestmirror, langpacks You need to be root to perform this command.（已解决）

你需要用root权限来执行此命令。

我在安装ssh的时候遇到的  

[hadoop@localhost ~]$ yum install ssh
Loaded plugins: fastestmirror, langpacks
You need to be root to perform this command.
[hadoop@localhost ~]$ su root
Password: 
[root@localhost hadoop]# yum install ssh
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
 * base: mirrors.sohu.com
 * elrepo: mirrors.tuna.tsinghua.edu.cn
 * extras: mirror.lzu.edu.cn
 * updates: mirrors.sohu.com
No package ssh available.
Error: Nothing to do
[root@localhost hadoop]#