在用yum安裝裝軟件或者使用curl的時候會出現這個錯誤
原因：
1、你的鏡像源被牆了
2、你的網絡配置有問題
3、也有可能是DNS服務器的問題我就是網卡配置的時候把DNS1=114.114.114.114寫成了DNS!=114.114.114.114
沒錯就是把“1”寫成了感嘆號（“!”），🤮了
免責聲明！
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