Base源注意不是全选项Base挑一个就够用清空之前的源不喜欢删除动作的话自己判断好备份也行但是备份这个其实没啥实际意义rm-rf/etc/yum.repos.d/*阿里云catCentOS-Base-ali.repozc [base] nameCentOS-7 - Base - Aliyun baseurlhttps://mirrors.aliyun.com/centos/7/os/$basearch/ gpgcheck1 enabled1 gpgkeyhttps://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7 [updates] nameCentOS-7 - Updates - Aliyun baseurlhttps://mirrors.aliyun.com/centos/7/updates/$basearch/ gpgcheck1 enabled1 gpgkeyhttps://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7 [extras] nameCentOS-7 - Extras - Aliyun baseurlhttps://mirrors.aliyun.com/centos/7/extras/$basearch/ gpgcheck1 enabled1 gpgkeyhttps://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7 [centosplus] nameCentOS-7 - Plus - Aliyun baseurlhttps://mirrors.aliyun.com/centos/7/centosplus/$basearch/ gpgcheck1 enabled0 gpgkeyhttps://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7 zc网易163cat/etc/yum.repos.d/CentOS-Base-163.repozc [base] nameCentOS-7.9.2009 - Base - 163 vault baseurlhttp://mirrors.163.com/centos-vault/7.9.2009/os/$basearch/ gpgcheck1 enabled1 gpgkeyhttp://mirrors.163.com/centos-vault/RPM-GPG-KEY-CentOS-7 [updates] nameCentOS-7.9.2009 - Updates - 163 vault baseurlhttp://mirrors.163.com/centos-vault/7.9.2009/updates/$basearch/ gpgcheck1 enabled1 gpgkeyhttp://mirrors.163.com/centos-vault/RPM-GPG-KEY-CentOS-7 [extras] nameCentOS-7.9.2009 - Extras - 163 vault baseurlhttp://mirrors.163.com/centos-vault/7.9.2009/extras/$basearch/ gpgcheck1 enabled1 gpgkeyhttp://mirrors.163.com/centos-vault/RPM-GPG-KEY-CentOS-7 [centosplus] nameCentOS-7.9.2009 - Plus - 163 vault baseurlhttp://mirrors.163.com/centos-vault/7.9.2009/centosplus/$basearch/ gpgcheck1 enabled0 gpgkeyhttp://mirrors.163.com/centos-vault/RPM-GPG-KEY-CentOS-7 zc清华TUNAcatCentOS-Base-tuna.repozc [base] nameCentOS-7 - Base - Tsinghua baseurlhttps://mirrors.tuna.tsinghua.edu.cn/centos/7/os/$basearch/ gpgcheck1 enabled1 gpgkeyhttps://mirrors.tuna.tsinghua.edu.cn/centos/RPM-GPG-KEY-CentOS-7 [updates] nameCentOS-7 - Updates - Tsinghua baseurlhttps://mirrors.tuna.tsinghua.edu.cn/centos/7/updates/$basearch/ gpgcheck1 enabled1 gpgkeyhttps://mirrors.tuna.tsinghua.edu.cn/centos/RPM-GPG-KEY-CentOS-7 [extras] nameCentOS-7 - Extras - Tsinghua baseurlhttps://mirrors.tuna.tsinghua.edu.cn/centos/7/extras/$basearch/ gpgcheck1 enabled1 gpgkeyhttps://mirrors.tuna.tsinghua.edu.cn/centos/RPM-GPG-KEY-CentOS-7 [centosplus] nameCentOS-7 - Plus - Tsinghua baseurlhttps://mirrors.tuna.tsinghua.edu.cn/centos/7/centosplus/$basearch/ gpgcheck1 enabled0 gpgkeyhttps://mirrors.tuna.tsinghua.edu.cn/centos/RPM-GPG-KEY-CentOS-7 zcEpel源Epel源是 CentOS 官方源没有的额外常用软件扩展仓库阿里云catepel-ali.repozc [epel] nameExtra Packages for Enterprise Linux 7 - Aliyun baseurlhttps://mirrors.aliyun.com/epel/7/$basearch failovermethodpriority enabled1 gpgcheck1 gpgkeyhttps://mirrors.aliyun.com/epel/RPM-GPG-KEY-EPEL-7 [epel-debuginfo] nameExtra Packages for Enterprise Linux 7 - Debug - Aliyun baseurlhttps://mirrors.aliyun.com/epel/7/$basearch/debug failovermethodpriority enabled0 gpgcheck1 gpgkeyhttps://mirrors.aliyun.com/epel/RPM-GPG-KEY-EPEL-7 [epel-source] nameExtra Packages for Enterprise Linux 7 - Source - Aliyun baseurlhttps://mirrors.aliyun.com/epel/7/SRPMS failovermethodpriority enabled0 gpgcheck1 gpgkeyhttps://mirrors.aliyun.com/epel/RPM-GPG-KEY-EPEL-7 zc#更新缓存yum clean allyum makecache