把系統默認的yum源改爲阿里雲（從阿里雲裏下載軟件）

Yum 源 Yum repolist [[email protected] ~]# yum repolist 查看當前的yun源 Loaded plugins: fastestmirror, security Loading mirror speeds from cached hostfile base: mirrors.aliyun.comm updates: mirrors.ali extra

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