什么是yum仓库

  yum仓库就是使用yum命令下载软件的镜像地址。
  我们通常使用 yum install 命令来在线安装 linux系统的软件, 这种方式可以自动处理依赖性关系,并且一次安装所有依赖的软体包,但是经常会遇到从国外镜像下载速度慢,无法下载的情况。那么此时我们就需要把我们的yum 源改为国内的镜像。
  yum的配置文件
  yum 的配置文件在 /etc/yum.repos.d 目录下, 其中有多个配置文件,每一个配置文件中都可以配置一个或多个repository, 但是最终会被合并为一个交给系统,所以多个文件只是为了方便管理。

清华大学镜像仓库

备份 CentOS-Base.repo

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

之后启用 TUNA 软件仓库, 将清华大学镜像仓库信息写入 /etc/yum.repos.d/CentOS-Base.repo

vi /etc/yum.repos.d/CentOS-Base.repo

将 CentOS-Base.repo 中的内容 更新为 下面的内容:

# 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

清除缓存

yum clean all     # 清除系统所有的yum缓存
yum makecache     # 生成yum缓存