centos8执行yum报错 unable to detect release version (use '--releasever' to specify release version)

解决办法

 yum install --releasever=8  centos-linux-release


执行yum的时候提示要带上--releasever=8参数才行, 检查后发现之前不知道把centos-linux-release给卸载了.

重新安装后解决.

# yum update

Failed to set locale, defaulting to C.UTF-8

Unable to detect release version (use '--releasever' to specify release version)

CentOS Linux $releasever - AppStream                                                                                                                            65  B/s |  38  B     00:00

Error: Failed to download metadata for repo 'appstream': Cannot prepare internal mirrorlist: No URLs in mirrorlist


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