linux centos6/7/8 redhat8自動 切換yum源

#!/bin/bash

centos6d(){

release=`cat /etc/redhat-release  |grep release | awk -F" " '{print $3}' | awk -F"." '{print $1}'` ; echo "centos 版本為： $release "

case "$release" in

"6") echo " 目前比對centos 版本為 6"

repo="/etc/yum.repos.d/centos6-epel.repo"

if [ ! -e $repo ]; then                 # -e 判斷檔案存在；參考：Shell if 條件判斷檔案或目錄

yum install -y wget

cd /etc/yum.repos.d/

mkdir bak

mv * bak

wget work.eisc.cn/ruanjian/rpm/yumrepo/centos6-epel.repo

wget work.eisc.cn/ruanjian/rpm/yumrepo/centos6.repo

yum clean all                           # 清除原有緩存

yum makecache                      # 生成新的緩存

                                               # make cache [me?k]  [ka?]  制作 緩存{ka xi}

yum  list                                       # 校驗yum

cd

else

echo "yum已經切換"

fi

;;

*) echo "低版本未比對到，正在比對紅帽版本配置yum ！！！"

redhat8d

esac

}

centos7(){

repo="/etc/yum.repos.d/epel-7.repo"

wget work.eisc.cn/ruanjian/rpm/yumrepo/Centos-7.repo

wget work.eisc.cn/ruanjian/rpm/yumrepo/epel-7.repo

# wget

http://mirrors.aliyun.com/repo/Centos-7.repo http://mirrors.aliyun.com/repo/epel-7.repo

                                               # 移動兩個檔案到 目錄

#wget

http://mirrors.163.com/.help/CentOS7-Base-163.repo

#sed -i  's/$releasever/7/g' /etc/yum.repos.d/CentOS-Base.repo

                                               # yum源沒有對應版本包比對；修改yum為centos7

centos8(){

repo="/etc/yum.repos.d/Centos-8.repo"

if [ ! -e $repo ]; then

wget -O /etc/yum.repos.d/CentOS-Base.repo

http://mirrors.aliyun.com/repo/Centos-8.repo

#sed -i 's/$releasever/8/g' /etc/yum.repos.d/CentOS-Base.repo

yum install -y

https://mirrors.aliyun.com/epel/epel-release-latest-8.noarch.rpm

wget -O /etc/yum.repos.d/epel8.repo work.eisc.cn/ruanjian/rpm/yumrepo/epel8.repo

#sed -i 's|^#baseurl=https://download.fedoraproject.org/pub|baseurl=https://mirrors.aliyun.com|' /etc/yum.repos.d/epel*

#sed -i 's|^metalink|#metalink|' /etc/yum.repos.d/epel*

yum clean all #清理緩存

yum makecache #更新源

redhat8d(){

release=`cat /etc/redhat-release  |grep release | awk -F" " '{print $6}' | awk -F"." '{print $1}'` ; echo "redhat 版本為： $release "

"8") echo " 目前比對redhat 版本為 8"

yum clean all ; yum makecache  ; yum list

*) echo "紅帽版本未比對到，退出！！！"

release=`cat /etc/redhat-release  |grep release | awk -F" " '{print $4}' | awk -F"." '{print $1}'` ; echo "centos 版本為： $release "

centos6

"7") echo " 目前比對centos 版本為 7"

centos7

"8") echo "目前比對centos 版本為 8"

centos8

*) echo "您的centos過于老舊，正在比對低版本"

centos6d

# centos 6 切換yum：

https://help.aliyun.com/document_detail/193569.htm

# wget www.eisc.cn/file/shell/centos-yum.sh ; sh centos-yum.sh

# 感謝網友提供yum解決方案：

https://developer.aliyun.com/article/748336

# 阿裡巴巴開源鏡像站，鏡像倉庫:  

https://developer.aliyun.com/mirror/

# 阿裡雲linux系統鏡像： 

https://mirrors.aliyun.com/centos-vault/