yum源配置

1、本地yum源，首先挂载iso文件，确保光盘挂载点有文件

在设备状态全部打勾

选择使用iso映像文件

如果在配置yum源过程中遇到yum被another app lock使用下面命令

rm -f /var/run/yum.pid

创建挂载点
mkdir -p /mnt/local
将iso文件挂载到指定挂载点
mount /dev/cdrom /mnt/local
[root@xuexi yum.repos.d]# ls  /mnt/local

CentOS_BuildTag  EULA  images    LiveOS   repodata       RPM-GPG-KEY-CentOS-Testing-7

EFI              GPL   isolinux  Packages  RPM-GPG-KEY-CentOS-7  TRANS.TBL

2、yum的一切配置信息都存储在一个叫yum.repos.d目录下的配置文件中。所以跳转到/etc/yum.repos.d目录下

cd /etc/yum.repos.d

3、创建一个新的yum源配置文件，yum源配置文件的结尾必须是.repo

vim CentOS7.repo

内容如下：

[CentOS7]                  //yum的ID，本地唯一，用于区分不同yum源
name=CentOS-server         //描述信息
baseurl=file:///mnt/local        //前面的file://是协议，后面的/mnt是光盘挂载点
enabled=1                  //1启用yum源，0禁用yum源
gpgcheck=0                 //1使用公钥验证rpm包的正确性，0不验证

保存退出后就可以开始验证了。

 如果启用公钥验证，需要配置公钥gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

4、接着清空yum已存在的源信息（缓存）

yum clean all

yum makecache

yum repolist       //验证local yum源是否配置成功

[root@localhost yum.repos.d]# yum clean all
Loaded plugins: fastestmirror, langpacks
Cleaning repos: centos7
Cleaning up list of fastest mirrors
Other repos take up 865 M of disk space (use --verbose for details)
[root@localhost yum.repos.d]# yum makecache 
Loaded plugins: fastestmirror, langpacks
Determining fastest mirrors
centos7                                                               | 3.6 kB  00:00:00     
(1/4): centos7/group_gz                                               | 153 kB  00:00:00     
(2/4): centos7/filelists_db                                           | 3.3 MB  00:00:01     
(3/4): centos7/primary_db                                             | 3.3 MB  00:00:00     
(4/4): centos7/other_db                                               | 1.3 MB  00:00:00     
Metadata Cache Created
[root@localhost yum.repos.d]# yum re
reinstall  remove     repolist   
[root@localhost yum.repos.d]# yum repolist 
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
repo id                                    repo name                                   status
centos7                                    centos7                                     4,070
repolist: 4,070
[root@localhost yum.repos.d]# yum mdadm
Loaded plugins: fastestmirror, langpacks
No such command: mdadm. Please use /usr/bin/yum --help
[root@localhost yum.repos.d]# yum install mdadm
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
Package mdadm-4.1-6.el7.x86_64 already installed and latest version
Nothing to do
[root@localhost yum.repos.d]#