https://yq.aliyun.com/articles/33286 (将Centos的yum源更换为国内的阿里云源)
http://blog.csdn.net/inslow/article/details/54177191
阿里云是最近新出的一个镜像源。得益于阿里云的高速发展,这么大的需求,肯定会推出自己的镜像源。阿里云Linux安装镜像源地址:http://mirrors.aliyun.com/
[root@localhost home]# yum repolist
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.aliyun.com
* extras: mirrors.aliyun.com
* updates: mirrors.aliyun.com
可以查看本机的yum源是哪里的?
CentOS系统更换软件安装源第一步:备份你的原镜像文件,以免出错后可以恢复。
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
第二步:下载新的CentOS-Base.repo 到/etc/yum.repos.d/
CentOS 6wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repoCentOS 7wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
更改CentOS-Media.repo使其为不生效:
enabled=0第三步:运行yum makecache生成缓存
yum clean allyum makecache
==========================================
[root@node1 data]# wget https://s3-us-west-2.amazonaws.com/grafana-releases/release/grafana-4.5.1-1.x86_64.rpm
--2017-09-22 13:00:12-- https://s3-us-west-2.amazonaws.com/grafana-releases/release/grafana-4.5.1-1.x86_64.rpm
Resolving s3-us-west-2.amazonaws.com (s3-us-west-2.amazonaws.com)... failed: Name or service not known.
wget: unable to resolve host address ‘s3-us-west-2.amazonaws.com’
下载yum镜像的时候出现wget失灵的情况,
wget默认安装的 分析是DNS的问题 解决办法:vi /etc/resolv.conf添加如下内容(默认里面什么都没有)
# Generated by NetworkManager (CentOS7 下就只有这句)
nameserver 114.114.114.114
nameserver 8.8.8.8
这样就OK了
在CentOS 7下,手工设置 /etc/resolv.conf 里的DNS,过了一会,发现被系统重新覆盖或者清除了。和CentOS 6下的设置DNS方法不同,有几种方式:
1、使用全新的命令行工具 nmcli 来设置
#显示当前网络连接#nmcli connection showNAME UUID TYPEDEVICEeno1 5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03 802-3-ethernet eno1#修改当前网络连接对应的DNS服务器,这里的网络连接可以用名称或者UUID来标识#nmcli con mod eno1 ipv4.dns "114.114.114.114 8.8.8.8"#enol 是社保名称#将dns配置生效#nmcli con up eno12、使用传统方法,手工修改 /etc/resolv.conf
修改 /etc/NetworkManager/NetworkManager.conf 文件,在main部分添加 “dns=none” 选项:[main]plugins=ifcfg-rhdns=noneNetworkManager重新装载上面修改的配置# systemctl restart NetworkManager.service手工修改 /etc/resolv.confnameserver 114.114.114.114nameserver 8.8.8.8详细参见:
# man NetworkManager.conf# man nmcli