Red hat yum功能收費，沒有註冊無法使用，需要替換成爲centOS的yum，按照流程來即可
查看
# rpm -qa | grep yum 查看當前安裝的yum
返回
yum-metadata-parser-1.1.4-10.el7.x86_64
yum-3.4.3-161.el7.noarch
刪除
# rpm -e yum-metadata-parser-1.1.4-10.el7.x86_64 --nodeps
# rpm -e yum-3.4.3-161.el7.noarch --nodeps
查詢原來yum的配置
# whereis yum
返回
yum: /etc/yum
刪除
# rm -fr /etc/yum
http://mirrors.163.com/centos找對應的版本
下載yum-plugin-fastestmirror-1.1.31-50.el7.noarch.rpm
下載yum-3.4.3-161.el7.centos.noarch.rpm
下載python-iniparse-0.4-9.el7.noarch.rpm
下載python-iniparse-0.4-9.el7.noarch.rpm
使用網易的yum鏡像，安裝上面四個rpm
# rpm -ivh python-iniparse-0.4-9.el7.noarch.rpm
# rpm -ivh yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
# rpm -ivh yum-3.4.3-161.el7.centos.noarch.rpm yum-plugin-fastestmirror-1.1.31-50.el7.noarch.rpm 最後兩個包互相依賴需要一起安裝
出現error可能版本與當前服務器不兼容cat /etc/issue查看版本號
# cd /etc/yum.repos.d/
下載http://mirrors.163.com/.help/CentOS7-Base-163.repo
放入yum源，需要修改路徑和版本，將變量寫死如下
# CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client. You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the
# remarked out baseurl= line instead.
#
#
[base]
name=CentOS-$releasever - Base - 163.com
#mirrorlist=http://mirrorlist.centos.org/?release=7&arch=x86-64&repo=os
baseurl=http://59.111.0.251/centos/7/os/x86_64/
gpgcheck=1
gpgkey=http://59.111.0.251/centos/RPM-GPG-KEY-CentOS-7
#released updates
[updates]
name=CentOS-$releasever - Updates - 163.com
#mirrorlist=http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=updates
baseurl=http://59.111.0.251/centos/7/updates/x86_64/
gpgcheck=1
gpgkey=http://59.111.0.251/centos/RPM-GPG-KEY-CentOS-7
#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras - 163.com
#mirrorlist=http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=extras
baseurl=http://59.111.0.251/centos/7/extras/x86_64/
gpgcheck=1
gpgkey=http://59.111.0.251/centos/RPM-GPG-KEY-CentOS-7
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus - 163.com
baseurl=http://59.111.0.251/centos/7/centosplus/x86_64/
gpgcheck=1
enabled=0
gpgkey=http://59.111.0.251/centos/RPM-GPG-KEY-CentOS-7
清理yum緩存
yum clean all
生成yum緩存
yum makecache
就可以使用yum來安裝軟件了~