Cannot find a valid baseurl for repo问题解决

先试一试:

ping www.google.com

如果不能识别(unknown host),而

ping 8.8.8.8

那么这是DNS问题。
编辑/etc/resolv.conf:

vim /etc/resolv.conf

添加:

nameserver 8.8.8.8
nameserver 8.8.4.4

再次尝试:

yum update

参考:https://unix.stackexchange.com/questions/22924/how-can-i-fix-cannot-find-a-valid-baseurl-for-repo-errors-on-centos

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