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redhat的yum是不可以直接使用的，所有我们更换redhat的yum源为centos的yum源

更换源的过程踩了很多坑听我细细道来

安装过程

1. 首先删除redhat原有的yum

rpm -aq | grep yum | xargs rpm -e --nodepsrpm -aq | grep python-iniparse | xargs rpm -e --nodeps

2. 下载yum安装包

下载地址: http://mirrors.163.com/centos/7/os/x86_64/Packages

下载命令:

wget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-3.4.3-163.el7.centos.noarch.rpmwget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-52.el7.noarch.rpmwget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-updateonboot-1.1.31-52.el7.noarch.rpmwget http://mirrors.163.com/centos/7/os/x86_64/Packages/python-iniparse-0.4-9.el7.noarch.rpmwget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpmwget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-utils-1.1.31-52.el7.noarch.rpm

安装rpm包

rpm -ivh [包的名称] (依次安装，如果提示有依赖，就先安装他所依赖的包)

rpm -ivh yum-3.4.3-163.el7.centos.noarch.rpm yum-plugin-fastestmirror-1.1.31-52.el7.noarch.rpm

创建文件/etc/yum.repos.d/CentOS-Base.repo

vim /etc/yum.repos.d/CentOS-Base.repo

以阿里云为例:

• 阿里云镜像站点：

[base]name=CentOS-$releasever - Basebaseurl=https://mirrors.aliyun.com/centos/7/os/$basearch/gpgcheck=1gpgkey=https://mirrors.aliyun.com/centos/7/os/x86_64/RPM-GPG-KEY-CentOS-7#released updates[updates]name=CentOS-$releasever - Updatesbaseurl=https://mirrors.aliyun.com/centos/7/updates/$basearch/gpgcheck=1gpgkey=https://mirrors.aliyun.com/centos/7/os/x86_64/RPM-GPG-KEY-CentOS-7[extras]name=CentOS-$releasever - Extrasbaseurl=https://mirrors.aliyun.com/centos/7/extras//$basearch/gpgcheck=1gpgkey=https://mirrors.aliyun.com/centos/7/os/x86_64/RPM-GPG-KEY-CentOS-7[centosplus]name=CentOS-$releasever - Plusbaseurl=https://mirrors.aliyun.com/centos/7/centosplus//$basearch/gpgcheck=1enabled=0

最后

yum clean allyum makecache（生成本地缓存）

测试

yum install nmap

成功!

转载地址：http://tyhzi.baihongyu.com/