rhel yum报错

用yum报错

http://mirrors.aliyun.com/centos/%24releasever/addons/x86_64/repodata/repomd.xml: [Errno 12] Timeout: <urlopen error timed out>
Trying other mirror.
http://mirrors.aliyuncs.com/centos/%24releasever/addons/x86_64/repodata/repomd.xml: [Errno 14] HTTP Error 404: Not Found
Trying other mirror.
Error: Cannot retrieve repository metadata (repomd.xml) for repository: addons. Please verify its path and try agai
是因为CentOS-Base.repo文件中%24releasever在redhat不识别,要改成5或者6(取决于操作系统版本号)
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