Linux Server release 7.3 更换阿里网络yum源

查看当前系统下的yum源

[root@localhost ~]# rpm -qa |grep yum
yum-3.4.3-150.el7.noarch
yum-utils-1.1.31-40.el7.noarch
yum-langpacks-0.4.2-7.el7.noarch
PackageKit-yum-1.0.7-6.el7.x86_64
yum-rhn-plugin-2.0.1-6.el7.noarch
yum-metadata-parser-1.1.4-10.el7.x86_64
[root@localhost ~]# 

删除当前yum源

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

到阿里云去找对应得yum源得rpm对应安装包：

 https://mirrors.aliyun.com/centos/7/os/x86_64/Packages

例如：

yum-utils-1.1.31-24.el7.noarch
yum-langpacks-0.4.2-3.el7.noarch
yum-metadata-parser-1.1.4-10.el7.x86_64
yum-rhn-plugin-2.0.1-4.el7.noarch
PackageKit-yum-0.8.9-11.el7.x86_64
yum-3.4.3-118.el7.noarch
页面中使用Ctrl+F搜索步骤3中的文件，不要带版本号:比如yum-utils-1.1.31-24.el7.noarch只需搜索yum-utils即可

 

cd /mnt 下载：

wget https://mirrors.aliyun.com/centos/7/os/x86_64/Packages/yum-utils-1.1.31-42.el7.noarch.rpm

wget https://mirrors.aliyun.com/centos/7/os/x86_64/Packages/yum-langpacks-0.4.2-7.el7.noarch.rpm

wget https://mirrors.aliyun.com/centos/7/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm

wget https://mirrors.aliyun.com/centos/7/os/x86_64/Packages/yum-rhn-plugin-2.0.1-9.el7.noarch.rpm

wget https://mirrors.aliyun.com/centos/7/os/x86_64/Packages/PackageKit-yum-1.1.5-1.el7.centos.x86_64.rpm

wget https://mirrors.aliyun.com/centos/7/os/x86_64/Packages/yum-3.4.3-154.el7.centos.noarch.rpm

在当前目录执行 rpm -ivh *.rpm

如果出现依赖关系错误装不上例如：

[root@localhost xx]# rpm -ivh *.rpm
warning: PackageKit-yum-1.1.5-1.el7.centos.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY
error: Failed dependencies:
        PackageKit(x86-64) = 1.1.5-1.el7.centos is needed by PackageKit-yum-1.1.5-1.el7.centos.x86_64
        rpm >= 0:4.11.3-22 is needed by yum-3.4.3-154.el7.centos.noarch
        yum-plugin-fastestmirror is needed by yum-3.4.3-154.el7.centos.noarch
[root@localhost xx]# 

故此处可以加上下面两个参数强制安装：

1. --force 即使覆盖属于其它包的文件也强迫安装
2. --nodeps 如果该RPM包的安装依赖其它包，即使其它包没装，也强迫安装。

   [root@localhost xx]# rpm -ivh *.rpm --force --nodeps 
   warning: PackageKit-yum-1.1.5-1.el7.centos.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY
   Preparing...                          ################################# [100%]
   Updating / installing...
      1:yum-metadata-parser-1.1.4-10.el7 ################################# [ 17%]
      2:yum-3.4.3-154.el7.centos         ################################# [ 33%]
      3:PackageKit-yum-1.1.5-1.el7.centos################################# [ 50%]
      4:yum-langpacks-0.4.2-7.el7        ################################# [ 67%]
      5:yum-rhn-plugin-2.0.1-9.el7       ################################# [ 83%]
      6:yum-utils-1.1.31-42.el7          ################################# [100%]
   [root@localhost xx]# 

   安装成功

yum clean all #清理yum缓存，使设置生效

yum makecache #将服务器上的软件包信息缓存到本地,以提高搜索安装软件的速度