在用yum安裝gcc的時候，報了錯誤：
[root@001 ~]#yum -y install gcc gcc-c++ kernel-devel Loaded plugins: fastestmirror, langpacks Loading mirror speeds from cached hostfile There are no enabled repos. Run "yum repolist all" to see the repos you have. To enable Red Hat Subscription Management repositories: subscription-manager repos --enableTo enable custom repositories: yum-config-manager --enable
1、檢查是否斷網
ping www.baidu.com
2、如果沒斷網，則說明是yum鏡像沒有了，需要下載一個：
cd /etc/yum.repos.d mv CentOS-Base.repo CentOS-Base.repo.backup wget http://mirrors.163.com/.help/CentOS6-Base-163.repo mv CentOS6-Base-163.repo CentOS-Base.repo yum clean all
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