檢視當前包

rpm -qa | grep yum

有內容, 執行解除安裝 (如果沒有內容顯示, 跳過這一步)

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

從網易映象站下載安裝包, 分別執行下列4條命令

wget http://mirrors.163.com/centos/7/os/x86_64/Packages/python-iniparse-0.4-9.el7.noarch.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
wget
 
 http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-3.4.3-158.el7.centos.noarch.rpm
wget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-45.el7.noarch.rpm

檢視當前目錄

ls

安裝, 分別執行以下2條命令

rpm -ivh yum*
rpm -ivh python-iniparse-0.4-9.el7.noarch.rpm

修改yum源倉庫

cd /etc/yum.repos.d/	#進入/etc/yum.repos.d/目錄
 

wget http://mirrors.163.com/.help/CentOS7-Base-163.repo
sed 's#$releasever#7#g' CentOS7-Base-163.repo
sed 's#$releasever#7#g' CentOS7-Base-163.repo -i

建立yum元資料快取

yum makecache

更新yum

yum update -y

增加EPEL源, 對 RHEL 標準yum源是一個很好的補充

wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo

下載例子: 用命令下載apache

yum -y install httpd