Redhat7 安裝 yum 博主親自安裝記錄！！！！

因爲以前安裝Redhat7 想安裝gcc   使用yum   install gcc  報錯：node This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register. vim 大概意思是是讓你先註冊一下。centos 這是redhat 自帶

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