查看yum源 | TommyHu.me

查看内核

uname -a
uname -srm
uname -r

查看系统版本

cat /etc/os-release

在新主机首次安装 Docker Engine-Community之前，需要设置Docker仓库，之后，您可以从仓库安装和更新 Docker。

设置仓库，需要安装所需的软件包。yum-utils 提供了 yum-config-manager ，并且 device mapper 存储驱动程序需要 device-mapper-persistent-data 和 lvm2。

su root

yum install -y yum-utils

yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

# 查看yum源
yum repolist

cp CentOS-Base.repo CentOS-Base-repo.bak

yum错误

File contains no section headers. file: file:///etc/yum.repos.d/CentOS-Base.repo, line: 1 '<!DOCTYPE html>\n'

网络上的鸡肋解决方法

方法1：配置yum源，修改/etc/yum.repos.d/CenOS-Base.repo文件
方法2：删除原文件重新下载
删除原有的文件 rm -f  /etc/yum.repos.d/CentOS-Base.repo  
重新下载，wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo  
清理缓存 yum clean all

实际问题，wget下载的文件格式不对，手动下载然后传到服务器中即可

rm -f  /etc/yum.repos.d/CentOS-Base.repo  
下载http://mirrors.aliyun.com/repo/Centos-7.repo
xftp以管理员打开，上传到/etc/yum.repos.d
yum clean all
yum update

xftp无权限

window以管理员运行

yum无法update和makcache

使用了桥接模式
可以ping通
无法yum update

更改网络适配器为NAT,桥接模式需要上网任务，同程管家，，，fk！！

改为NAT后，重启虚拟机，yum makcache搞定

1、首先备份 CentOS-Base.repo sudo mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak
2.将yum源配置文件/etc/yum.repos.d/CentOS-Base.repo改为清华源，内容如下:
CentOS-Base.repo
The mirror system uses the connecting IP address of the client and the
update status of each mirror to pick mirrors that are updated to and
geographically close to the client. You should use this for CentOS updates
unless you are manually picking other mirrors.
If the mirrorlist= does not work for you, as a fall back you can try the
remarked out baseurl= line instead.
[base] name=CentOS-$releasever - Base baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/os/$basearch/ #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
#released updates [updates] name=CentOS-$releasever - Updates baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/updates/$basearch/ #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
#additional packages that may be useful [extras] name=CentOS-$releasever - Extras baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/extras/$basearch/ #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
#additional packages that extend functionality of existing packages [centosplus] name=CentOS-$releasever - Plus baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/centosplus/$basearch/ #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus gpgcheck=1 enabled=0 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7 3、清除缓存
yum clean all
rm -rf /var/cache/yum/
4、生成缓存
yum makecache

yum错误 #

xftp无权限 #

yum无法update和makcache #

CentOS-Base.repo #

#

The mirror system uses the connecting IP address of the client and the #

update status of each mirror to pick mirrors that are updated to and #

geographically close to the client. You should use this for CentOS updates #

unless you are manually picking other mirrors. #

#

If the mirrorlist= does not work for you, as a fall back you can try the #

remarked out baseurl= line instead. #

#

#

yum错误

xftp无权限

yum无法update和makcache

CentOS-Base.repo

The mirror system uses the connecting IP address of the client and the

update status of each mirror to pick mirrors that are updated to and

geographically close to the client. You should use this for CentOS updates

unless you are manually picking other mirrors.

If the mirrorlist= does not work for you, as a fall back you can try the

remarked out baseurl= line instead.