centos换源

• 备份之前的源文件

# 进入Root用户
su
# 备份源文件
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

• 查看自己当前的centos版本

cat /etc/system-release

• 查看和下载对应版本的源

# 阿里源
# centos5
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-5.repo

# centos6
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo

# centos7
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

# 网易源
# centos5
wget http://mirrors.163.com/.help/CentOS5-Base-163.repo

# centos6
wget http://mirrors.163.com/.help/CentOS6-Base-163.repo

# centos7
wget http://mirrors.163.com/.help/CentOS7-Base-163.repo

• 清空yum缓存并生存cache文件

yum clean all
yum makecache

• 更新软件

yum -y update

• 如果 wget 没有安装，运行下面命令安装 wget 软件

• yum update --skip-broken
  yum -y install wget