CentOS7配置本地yum

实验环境为Centos7.5

[root@localhost ~]# mkdir /mnt/cdrom #创建挂载文件夹

[root@localhost ~]# mount /dev/cdrom /mnt/cdrom #挂载光驱ISO文件

mount: /dev/sr0 写保护，将以只读方式挂载
#[root@localhost ~]# mount /opt/CentOS-7-x86_64-Minimal-1804.iso /mnt/cdrom #挂载本地ISO文件也是相同的#
[root@localhost ~]# ls /mnt/cdrom/ #检查挂载文件

CentOS_BuildTag  EULA  images    LiveOS    repodata              RPM-GPG-KEY-CentOS-Testing-7
EFI              GPL   isolinux  Packages  RPM-GPG-KEY-CentOS-7  TRANS.TBL
[root@localhost ~]# cd /etc/yum.repos.d/ #进入yum配置文件夹

[root@localhost yum.repos.d]# ls #查看yum配置文件

CentOS-Base.repo  CentOS-Debuginfo.repo  CentOS-Media.repo    CentOS-Vault.repo
CentOS-CR.repo    CentOS-fasttrack.repo  CentOS-Sources.repo
[root@localhost yum.repos.d]# mv CentOS-Base.repo CentOS-Base.repo.bak #移动网络yum配置文件，无法找到时会转到本地下载。

[root@localhost yum.repos.d]# cp CentOS-Media.repo CentOS-Media.repo.bak #备份本地yum配置文件

[root@localhost yum.repos.d]# vi CentOS-Media.repo #编辑本地yum配置文件

# CentOS-Media.repo
#
#  This repo can be used with mounted DVD media, verify the mount point for
#  CentOS-7.  You can use this repo and yum to install items directly off the
#  DVD ISO that we release.
#
# To use this repo, put in your DVD and use it with the other repos too:
#  yum --enablerepo=c7-media [command]
#
# or for ONLY the media repo, do this:
#
#  yum --disablerepo=\* --enablerepo=c7-media [command]

[c7-media]
name=CentOS-$releasever - Media
baseurl=file:///media/CentOS/
        file:///mnt/cdrom/ #将目录改成光盘挂载点

        file:///media/cdrecorder/
gpgcheck=1
enabled=1 #将enabled=0改成1

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
#保存退出

[root@localhost yum.repos.d]# yum install -y net-tools  #安装网络工具进行测试

.
.此处省略安装过程
.
完毕！#本地yum可以正常使用了