YUM

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yum update和yum upgrade的真正区别

https://cloud.tencent.com/developer/article/1604418...

步骤备份原来的源cp/etc/yum.repos.d/CentOS-Base.repo/etc/yum.repos.d/CentOS-Base.repo.bak新建空白源文件vim/etc/yum.r...

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