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2021年7月04日- 書箋
cd /etc/yum.repos.d
mv ./CentOS-Base.repo ./CentOS-Base.repo.bak
wget http://mirrors.163.com/.help/CentOS7-Base-163.repo
mv CentOS7-Base-163.repo /etc/yum.repos.d/CentOS-Base.repo
yum clean allyum makecache