進入yum源配置目錄: cd /etc/yum.repos.dcentos
若是沒有先安裝wget: sudo yum install wget緩存
修改yum源,就是修改CentOS-Base.repo的內容,因此咱們要先備份一下原來的: sudo mv CentOS-Base.repo CentOS-Base.repo.backupbash
而後用wget下載國內的yum源(即CentOS-Base.repo文件),新的在哪呢?目前國內主要有三個yum源:ui
sudo wget -O CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
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sudo wget -O CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo
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sudo wget -O CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-5.repo
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sudo wget -O CentOS-Base.repo http://mirrors.163.com/.help/CentOS7-Base-163.repo
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sudo wget -O CentOS-Base.repo http://mirrors.163.com/.help/CentOS6-Base-163.repo
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sudo wget -O CentOS-Base.repo http://mirrors.163.com/.help/CentOS5-Base-163.repo
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sudo wget -O CentOS-Base.repo https://lug.ustc.edu.cn/wiki/_export/code/mirrors/help/centos?codeblock=3
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sudo wget -O CentOS-Base.repo https://lug.ustc.edu.cn/wiki/_export/code/mirrors/help/centos?codeblock=2
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sudo wget -O CentOS-Base.repo https://lug.ustc.edu.cn/wiki/_export/code/mirrors/help/centos?codeblock=1
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先清除原來的元數據緩存阿里雲
sudo yum clean all
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sudo yum makecache
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