安装wget
更换阿里源
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| cd /etc/yum.repos.d/
# 备份
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
cat CentOS-Base.repo
#更换阿里源
wget http://mirrors.aliyun.com/repo/Centos-altarch-7.repo -O /etc/yum.repos.d/CentOS-Base.repo
#查看是否更换成功
cat /etc/yum.repos.d/CentOS-Base.repo
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更换成功后清除缓存并重建
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| yum clean all
yum makecache
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安装vim