【yum】yum “Status code: 404 for http:”错误

错误：

[root@localhost ~]# yum install redis
Failed to set locale, defaulting to C.UTF-8
CentOS-mycompany - Base 1.2 kB/s | 236 B 00:00
Errors during downloading metadata for repository 'base':- Status code: 404 for http://rdmirrors.h3c.com/centos/8/os/x86_64/repodata/repomd.xml (IP: 10.153.3.130)
Error: Failed to download metadata for repo 'base': Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried

分析：

HTTP 404 就是找不到网页。

将下面的yum使用的搜索路径，逐层的输入浏览器分析是哪一层开始找不到：http://rdmirrors.h3c.com/centos/8/os/x86_64/repodata/repomd.xml

最终发现http://rdmirrors.h3c.com/centos/8/ 下没有os，原来从8 开始，目录结构改变了。

CentOS-Base.repo里面的Base

baseurl=http://rdmirrors.h3c.com/centos/$releasever/os/$basearch/

也就是

baseurl=http://rdmirrors.h3c.com/centos/8/os/x86_64/ 明显路径不对。所以需要修改

# CentOS-Base.repo

[base]
name=CentOS-mycompany - Basebaseurl=http://rdmirrors.h3c.com/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=http://rdmirrors.h3c.com/centos/RPM-GPG-KEY-CentOS-$releasever

#released updates[updates]
name=CentOS-mycompany - Updates
baseurl=http://rdmirrors.h3c.com/centos/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=http://rdmirrors.h3c.com/centos/RPM-GPG-KEY-CentOS-$releasever

#additional packages that may be useful
[extras]
name=CentOS-mycompany - Extras
baseurl=http://rdmirrors.h3c.com/centos/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=http://rdmirrors.h3c.com/centos/RPM-GPG-KEY-CentOS-$releasever

#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-mycompany - Plus
baseurl=http://rdmirrors.h3c.com/centos/$releasever/centosplus/$basearch/
gpgcheck=1
enabled=1
gpgkey=http://rdmirrors.h3c.com/centos/RPM-GPG-KEY-CentOS-$releasever

其他报404错误的，如[updates]、[extras]、[centosplus]也应该这样分析。

[extras]

baseurl=http://rdmirrors.h3c.com/centos/$releasever/extras/$basearch

根据

改为

baseurl=http://rdmirrors.h3c.com/centos/$releasever/extras/$basearch/os

[centosplus]
baseurl=http://rdmirrors.h3c.com/centos/$releasever/centosplus/$basearch/

根据

改为：

[centosplus]
baseurl=http://rdmirrors.h3c.com/centos/$releasever/centosplus/$basearch/os

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