RedHat7安装yum工具

一                   RedHat7安装yum工具

1.1        查看yum是否可用

yum list
yum repolist

1.2        卸载原yum

rpm -aq|grep yum

rpm -aq|grep yum|xargs rpm -e --nodeps

1.3        下载centos源

wget -P /home/user/testyum https://mirrors.aliyun.com/centos/7.6.1810/os/x86_64/Packages/yum-3.4.3-161.el7.centos.noarch.rpm

wget -P /home/user/testyum https://mirrors.aliyun.com/centos/7.6.1810/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm

wget -P /home/user/testyum https://mirrors.aliyun.com/centos/7.6.1810/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-50.el7.noarch.rpm

wget -P /home/user/testyum https://mirrors.aliyun.com/centos/7.6.1810/os/x86_64/Packages/python-iniparse-0.4-9.el7.noarch.rpm

cd /home/user/testyum
ls

1.4        安装centos源包

rpm -ivh python-iniparse-0.4-.el7.noarch.rpm

rpm -ivh yum-metadata-parser-1.1.-.el7.x86_64.rpm

rpm -ivh yum-3.4.-.el7.centos.noarch.rpm yum-plugin-fastestmirror-1.1.-.el7.noarch.rpm

因为安装包之间存在相互依赖关系，四个源包按照顺序安装。

1.5        修改yum的repo配置文件

cd /etc/yum.repos.d/
ls
mv redhat.repo redhat.repo.backup
wget http://mirrors.163.com/.help/CentOS7-Base-163.repo
vi CentOS7-Base-.repo

修改变量-$releasever为7

1.6        清除原有yum缓存

yum clean all

1.7        建立新的yum缓存

yum makecache