CentOS更换yum源

centos系统更换源

1.备份原始yum源

cp /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak

2.下载yum文件，替代原始yum源（这里替换aliyun源）

CentOS 6系统命令

wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-vault-6.10.repo

如果wget命令不生效，说明还没有安装wget工具，或者使用

curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-vault-6.10.repo

CentOS 7系统命令

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

或者

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

CentOS 8系统命令

curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-vault-8.5.2111.repo

或者

wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-vault-8.5.2111.repo

3.yum clean all && yum makecache 清除并生成缓存，会把新下载CentOS-Base.repo源生效。

4.其它

非阿里云ECS用户会出现 Couldn't resolve host 'mirrors.cloud.aliyuncs.com' 信息，不影响使用。用户也可自行修改相关配置: eg:

sed -i -e '/mirrors.cloud.aliyuncs.com/d' -e '/mirrors.aliyuncs.com/d' /etc/yum.repos.d/CentOS-Base.repo

其它yum源下载地址：

腾讯源

   Centos5: http://mirrors.cloud.tencent.com/repo/centos5_base.repo

   Centos6: http://mirrors.cloud.tencent.com/repo/centos6_base.repo

   Centos7: http://mirrors.cloud.tencent.com/repo/centos7_base.repo

网易源

    Centos5: http://mirrors.163.com/.help/CentOS5-Base-163.repo

    Centos6: http://mirrors.163.com/.help/CentOS6-Base-163.repo

    Centos7: http://mirrors.163.com/.help/CentOS7-Base-163.repo

华为源

    Centos5:https://repo.huaweicloud.com/repository/conf/CentOS-5-reg.repo

    Centos6:https://repo.huaweicloud.com/repository/conf/CentOS-6-reg.repo

    Centos7:https://repo.huaweicloud.com/repository/conf/CentOS-7-reg.repo

注意：安装时可能出现的错误

-bash: wget: command not found

解决办法：

# 执行如下命令

yum install -y wget