报错如下：吉吉影音电影

Updating Subscription Management repositories.

Unable to read consumer identity

This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.

Error: There are no enabled repos.

翻译一下即是：无法读取用户记号此系统未注册到“红帽订阅料理”。您不错使用订阅料理器进行注册。不实:莫得启用的回购。

处理决策：干掉yum，再行装个centos的yum

# 1. 删除系统自带yum包
[root@localhost ~]# rpm -qa|grep yum
yum-4.0.9.2-5.el8.noarch
# 2. 不查验依赖奏凯删除总计yum包
[root@localhost ~]# rpm -qa|grep yum|xargs rpm -e --nodeps
#  3. 查验是否删除到手
[root@localhost ~]# rpm -qa|grep yum

下一步，安设yum，使用阿里云镜像，找一下最新版的yum包，和 python3-urllib包

 https://mirrors.aliyun.com/centos/8/BaseOS/x86_64/os/Packages/  

图片

wget  https://mirrors.aliyun.com/centos/8/BaseOS/x86_64/os/Packages/yum-4.7.0-4.el8.noarch.rpm
wget  https://mirrors.aliyun.com/centos/8/BaseOS/x86_64/os/Packages/yum-utils-4.0.21-3.el8.noarch.rpm
wget  https://mirrors.aliyun.com/centos/8/BaseOS/x86_64/os/Packages/python3-urllib3-1.24.2-5.el8.noarch.rpm
wget  https://mirrors.aliyun.com/centos/8/BaseOS/x86_64/os/Packages/dnf-4.7.0-4.el8.noarch.rpm
wget  https://mirrors.aliyun.com/centos/8/BaseOS/x86_64/os/Packages/python3-dnf-4.7.0-4.el8.noarch.rpm
wget  https://mirrors.aliyun.com/centos/8/BaseOS/x86_64/os/Packages/python3-dnf-plugins-core-4.0.21-3.el8.noarch.rpm

安设

小色哥奇米在线 key ID 8483c65d: NOKEY
Verifying...                          ################################# [100%]
Preparing...                          ################################# [100%]
Updating / installing...
   1:dnf-4.7.0-4.el8                  ################################# [100%]
[root@localhost ~]# rpm -ivh --force --nodeps yum-4.7.0-4.el8.noarch.rpm
warning: yum-4.7.0-4.el8.noarch.rpm: Header V3 RSA/SHA256 Signature， key ID 8483c65d: NOKEY
Verifying...                          ################################# [100%]
Preparing...                          ################################# [100%]
Updating / installing...
   1:yum-4.7.0-4.el8                  ################################# [100%]
[root@localhost ~]# rpm -ivh --force --nodeps yum-utils-4.0.21-3.el8.noarch.rpm
warning: yum-utils-4.0.21-3.el8.noarch.rpm: Header V3 RSA/SHA256 Signature， key ID 8483c65d: NOKEY
Verifying...                          ################################# [100%]
Preparing...                          ################################# [100%]
Updating / installing...
   1:yum-utils-4.0.21-3.el8           ################################# [100%]
[root@localhost ~]# rpm -ivh --force --nodeps python3-urllib3-1.24.2-5.el8.noarch.rpm
warning: python3-urllib3-1.24.2-5.el8.noarch.rpm: Header V3 RSA/SHA256 Signature， key ID 8483c65d: NOKEY
Verifying...                          ################################# [100%]
Preparing...                          ################################# [100%]
Updating / installing...
   1:python3-urllib3-1.24.2-5.el8     ################################# [100%]
[root@localhost ~]# " cm-theme="neo" cm-mode="Plain-Text">[root@localhost ~]# rpm -ivh --force --nodeps python3-dnf-4.7.0-4.el8.noarch.rpm
warning: python3-dnf-4.7.0-4.el8.noarch.rpm: Header V3 RSA/SHA256 Signature， key ID 8483c65d: NOKEY
Verifying...                          ################################# [100%]
Preparing...                          ################################# [100%]
Updating / installing...
   1:python3-dnf-4.7.0-4.el8          ################################# [100%]
[root@localhost ~]# rpm -ivh --force --nodeps python3-dnf-plugins-core-4.0.21-3.el8.noarch.rpm
warning: python3-dnf-plugins-core-4.0.21-3.el8.noarch.rpm: Header V3 RSA/SHA256 Signature， key ID 8483c65d: NOKEY
Verifying...                          ################################# [100%]
Preparing...                          ################################# [100%]
Updating / installing...
   1:python3-dnf-plugins-core-4.0.21-3################################# [100%]
[root@localhost ~]# rpm -ivh --force --nodeps dnf-4.7.0-4.el8.noarch.rpm
warning: dnf-4.7.0-4.el8.noarch.rpm: Header V3 RSA/SHA256 Signature， key ID 8483c65d: NOKEY
Verifying...                          ################################# [100%]
Preparing...                          ################################# [100%]
Updating / installing...
   1:dnf-4.7.0-4.el8                  ################################# [100%]
[root@localhost ~]# rpm -ivh --force --nodeps yum-4.7.0-4.el8.noarch.rpm
warning: yum-4.7.0-4.el8.noarch.rpm: Header V3 RSA/SHA256 Signature， key ID 8483c65d: NOKEY
Verifying...                          ################################# [100%]
Preparing...                          ################################# [100%]
Updating / installing...
   1:yum-4.7.0-4.el8                  ################################# [100%]
[root@localhost ~]# rpm -ivh --force --nodeps yum-utils-4.0.21-3.el8.noarch.rpm
warning: yum-utils-4.0.21-3.el8.noarch.rpm: Header V3 RSA/SHA256 Signature， key ID 8483c65d: NOKEY
Verifying...                          ################################# [100%]
Preparing...                          ################################# [100%]
Updating / installing...
   1:yum-utils-4.0.21-3.el8           ################################# [100%]
[root@localhost ~]# rpm -ivh --force --nodeps python3-urllib3-1.24.2-5.el8.noarch.rpm
warning: python3-urllib3-1.24.2-5.el8.noarch.rpm: Header V3 RSA/SHA256 Signature， key ID 8483c65d: NOKEY
Verifying...                          ################################# [100%]
Preparing...                          ################################# [100%]
Updating / installing...
   1:python3-urllib3-1.24.2-5.el8     ################################# [100%]
[root@localhost ~]#