redhat7.3安装yum源

#检查rehat自带的yum源
[root@localhost ~]# rpm -qa | grep yum
yum-langpacks-0.4.-.el7.noarch
yum-3.4.-.el7.noarch
yum-rhn-plugin-2.0.-.el7.noarch
yum-utils-1.1.-.el7.noarch
yum-metadata-parser-1.1.-.el7.x86_64

卸载redhat自带的yum源

[root@localhost ~]# rpm -e yum-langpacks-0.4.-.el7.noarch  --nodeps
warning: /etc/yum/pluginconf.d/langpacks.conf saved as /etc/yum/pluginconf.d/langpacks.conf.rpmsave
[root@localhost ~]# rpm -e yum-3.4.-.el7.noarch  --nodeps
[root@localhost ~]# rpm -e yum-rhn-plugin-2.0.-.el7.noarch  --nodeps
[root@localhost ~]# rpm -e yum-utils-1.1.-.el7.noarch  --nodeps
[root@localhost ~]# rpm -e yum-metadata-parser-1.1.-.el7.x86_64  --nodeps

检查是否充分卸载

[root@localhost ~]# rpm -qa | grep yum

通过网易来源网站下载rpm文件

[root@localhost yum]# wget  http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-50.el7.noarch.rpm

[root@localhost yum]# wget  http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-updateonboot-1.1.31-50.el7.noarch.rpm
[root@localhost yum]# wget  http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-utils-1.1.31-50.el7.noarch.rpm
[root@localhost yum]# wget  http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
[root@localhost yum]# wget  http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-3.4.3-161.el7.centos.noarch.rpm

rpm安装

[root@localhost yum]# rpm -ivh yum-*
warning: yum-3.4.-.el7.centos.noarch.rpm: Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY
Preparing...                          ################################# [%]
Updating / installing...
   :yum-metadata-parser-1.1.-.el7 ################################# [ %]
   :yum-plugin-fastestmirror-1.1.-################################# [ %]
   :yum-3.4.-.el7.centos         ################################# [ %]
   :yum-updateonboot-1.1.-.el7   ################################# [ %]
   :yum-utils-1.1.-.el7          ################################# [%]

配置repo文件

[root@localhost yum]# vim /etc/yum.repos.d/CentOS-Base.repo

注意版本修改

[base]
name=CentOS-$releasever -Base
baseurl=http://mirrors.163.com/centos/7/os/$basearch/
gpgcheck=
gpgkey=http://mirrors.163.com/centos/7/os/x86_64/RPM-GPG-KEY-CentOS-7

#released updates
[updates]
name=CentOS-$releasever - Updates
baseurl=http://mirrors.163.com/centos/7/updates/$basearch/
gpgcheck=
gpgkey=http://mirrors.163.com/centos/7/os/x86_64/RPM-GPG-KEY-CentOS-7

[extras]
name=CentOS-$releasever - Extras
baseurl=http://mirrors.163.com/centos/7/extras/$basearch/
gpgcheck=
gpgkey=http://mirrors.163.com/centos/7/os/x86_64/RPM-GPG-KEY-CentOS-7
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
baseurl=http://mirrors.163.com/centos/7/centosplus/$basearch/
gpgcheck=
enabled=
gpgkey=http://mirrors.163.com/centos/7/os/x86_64/RPM-GPG-KEY-CentOS-7

检查/etc/yum.repos.d目录下只有一个CentOS-Base.repo起作用

yum clean all

Loaded plugins: fastestmirror, product-id, search-disabled-repos, subscription-manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
Cleaning repos: base extras updates
Cleaning up everything

检测可以用