Centos下更新yum軟件管理器下載來源

1.備份軟件包下載源

#/cd  /etc/yum.repos.d/

#mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

 

2.下載新的CentOS-Base.repo

CentOS 5

#wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-5.repo

或者

#curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-5.repo

 

CentOS 6

#wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo

或者

#curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo

 

CentOS 7

#wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

或者

#curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

 

3.之后運行yum makecache生成緩存

#yum clean all

#yum makecache

如果報錯

Error: Cannot retrieve repository metadata (repomd.xml) for repository: rpmforge. 
Please verify its path and try again

請刪除除CentOS-Base.repo以外的rpm軟件更新包