centos7.4yum錯誤

1. 首先刪除redhat原有的yum

1.   rpm -aq | grep yum | xargs rpm -e --nodeps
2.   rpm -aq | grep python-iniparse | xargs rpm -e --nodeps

    查看是否已經卸載完成：

1.   rpm -aq | grep yum
2.   rpm -aq | grep python-iniparse

2. 下載yum安裝包

1.  wget http://mirrors.163.com/centos/7.4.1708/os/x86_64/Packages/yum-3.4.3-154.el7.centos.noarch.rpm
2.  wget http://mirrors.163.com/centos/7/os/x86_64/Packages/python-iniparse-0.4-9.el7.noarch.rpm
3.  wget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
4.  wget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-42.el7.noarch.rpm
5. wget http://mirrors.163.com/centos/7/os/x86_64/RPM-GPG-KEY-CentOS-7

先安裝python，在安裝yum-metadata 最後兩個yum一起安裝。

3. 安裝下載的rpm包

rpm -ivh python-iniparse-0.4-9.el7.noarch.rpm yum-metadata-parser-1.1.4-10.el7.x86_64.rpm yum-3.4.3-154.el7.centos.noarch.rpm yum-plugin-fastestmirror-1.1.31-42.el7.noarch.rpm

4. 創建文件/etc/yum.repos.d/CentOS-Base.repo

可以使用網易雲或阿裡雲鏡像站點：

網易雲鏡像：

[base]
name=CentOS-$releasever - Base
baseurl=http://mirrors.163.com/centos/7.4.1708/os/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/7.4.1708/os/x86_64/RPM-GPG-KEY-CentOS-7
 
#released updates
[updates]
name=CentOS-$releasever - Updates
baseurl=http://mirrors.163.com/centos/7.4.1708/updates/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/7.4.1708/os/x86_64/RPM-GPG-KEY-CentOS-7
 
[extras]
name=CentOS-$releasever - Extras
baseurl=http://mirrors.163.com/centos/7.4.1708/extras//$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/7.4.1708/os/x86_64/RPM-GPG-KEY-CentOS-7
 
[centosplus]
name=CentOS-$releasever - Plus
baseurl=http://mirrors.163.com/centos/7.4.1708/centosplus//$basearch/
gpgcheck=1
enabled=0

阿裡雲鏡像：

[base]
name=CentOS-$releasever - Base
baseurl=https://mirrors.aliyun.com/centos/7.4.1708/os/$basearch/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/7.4.1708/os/x86_64/RPM-GPG-KEY-CentOS-7
 
#released updates
[updates]
name=CentOS-$releasever - Updates
baseurl=https://mirrors.aliyun.com/centos/7.4.1708/updates/$basearch/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/7.4.1708/os/x86_64/RPM-GPG-KEY-CentOS-7
 
[extras]
name=CentOS-$releasever - Extras
baseurl=https://mirrors.aliyun.com/centos/7.4.1708/extras//$basearch/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/7.4.1708/os/x86_64/RPM-GPG-KEY-CentOS-7
 
[centosplus]
name=CentOS-$releasever - Plus
baseurl=https://mirrors.aliyun.com/centos/7.4.1708/centosplus//$basearch/
gpgcheck=1
enabled=0

5. yum clean all

6. yum makecache（生成本地緩存）

附：yum源變更說明

經查從2018年05月24日起阿裡雲和網易雲鏡像站點中對於CentOS 7.4.1708版本的yum源已經不做支持，在鏡像站點中附帶了一個readme文件說明如下：

解決該站點鏡像無法使用的方式有如下兩種：

方式一：將上述第4點中所有的7.4.1708替換為7

方式二：將上述第4點中所有的mirrors.163.com或mirrors.aliyun.com替換為vault.centos.org

yum update出現：