-- 查看yum
rpm -qa |grep yum
--卸載yum
rpm -qa | grep yum | xargs rpm -e --nodeps
--拷貝centos系統yum工具安裝程序到linux指定目錄下
wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/yum-3.4.3-132.el7.centos.0.1.noarch.rpm
wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/python-iniparse-0.4-9.el7.noarch.rpm
wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-34.el7.noarch.rpm
wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/yum-utils-1.1.31-34.el7.noarch.rpm
wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/yum-updateonboot-1.1.31-34.el7.noarch.rpm
--安裝yum包
rpm -ivh yum-*
rpm -ivh *.rpm
--新建repo配置文件
vim /etc/yum.repos.d/CentOS-Base.repo
--repo配置如下:
[base]
name=CentOS-$releasever - Base
baseurl=http://vault.centos.org/centos/7.2.1511/os/$basearch/
gpgcheck=1
gpgkey=http://vault.centos.org/centos/7.2.1511/os/x86_64/RPM-GPG-KEY-CentOS-7
#released updates
[updates]
name=CentOS-$releasever - Updates
baseurl=http://vault.centos.org/centos/7.2.1511/updates/$basearch/
gpgcheck=1
gpgkey=http://vault.centos.org/centos/7.2.1511/os/x86_64/RPM-GPG-KEY-CentOS-7
[extras]
name=CentOS-$releasever - Extras
baseurl=http://vault.centos.org/centos/7.2.1511/extras//$basearch/
gpgcheck=1
gpgkey=http://vault.centos.org/centos/7.2.1511/os/x86_64/RPM-GPG-KEY-CentOS-7
[centosplus]
name=CentOS-$releasever - Plus
baseurl=http://vault.centos.org/centos/7.2.1511/centosplus//$basearch/
gpgcheck=1
enabled=0