1. 刪除已安裝的yum包
將linux自帶的yum源刪除
rpm -qa | grep yum | xargs rpm -e --nodeps
cd /etc/rpm/
rm -rf ./m*
2. 下載centos的yum包
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-utils-1.1.31-52.el7.noarch.rpm
wget https://mirrors.aliyun.com/centos/7/os/x86_64/Packages/yum-3.4.3-163.el7.centos.noarch.rpm
wget https://mirrors.aliyun.com/centos/7/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-52.el7.noarch.rpm
wget https://mirrors.aliyun.com/centos/7/os/x86_64/Packages/python-urlgrabber-3.10-9.el7.noarch.rpm?
如果出現(xiàn)404錯(cuò)誤蔗坯，請(qǐng)去https://mirrors.aliyun.com/centos/7/os/x86_64/Packages/搜索關(guān)鍵詞查詢最新rpm包的鏈接叛溢。
3. 強(qiáng)制安裝rpm包
--force --nodeps為忽略依賴檢測(cè)的強(qiáng)制安裝
rpm -ivhpython-urlgrabber-3.10-9.el7.noarch.rpm?--force --nodeps
rpm -ivh yum* --force --nodeps
4. 查看yum包是否安裝好
rpm -qa |grep yum
yum-metadata-parser-1.1.4-10.el7.x86_64
yum-utils-1.1.31-45.el7.noarch
yum-3.4.3-158.el7.centos.noarch
yum-plugin-fastestmirror-1.1.31-45.el7.noarch
5. 修改repo
下載源文件
curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
需要把Centos-7.repo文件中的$releasever全部替換為7
cd /etc/yum.repos.d/
ls
vim CentOS-Base.repo
在vim中執(zhí)行:%s/$releasever/7/g快速替換。保存退出作媚。
6. 清空重載yum
yum clean all
yum update
# 最后查看一下yum列表
yum list
