前言

通常我们自己用的系统是可以联网的，但是一般生产环境都是内网，不可以上网，那么这时候可以创建本地yum源，安装一些基础的安装包。

一、创建本地yum源步骤

1.将镜像.iso文件上传到服务器

[root@localhost ~]# ls CentOS-7-x86_64-DVD-1708.iso
CentOS-7-x86_64-DVD-1708.iso

2.在根目录下新建一个iso目录用于挂在本地iso镜像

[root@localhost ~]# mkdir /iso
[root@localhost ~]# ls /
bin
boot
dev
etc
home
iso
lib
lib64
media
mnt
opt
proc
root
run
sbin
srv
sys
tmp
usr
var

3.使用命令将iso镜像挂在到iso目录

[root@localhost ~]# mount -o loop /root/CentOS-7-x86_64-DVD-1708.iso /iso
mount: /dev/loop0 is write-protected, mounting read-only

4.备份原yum源配置文件

[root@localhost ~]# mv /etc/yum.repos.d/ /etc/yum.repos.d.bak

5.创建本地yum源配置目录

代码如下（示例）：

[root@localhost ~]# mkdir /etc/yum.repos.d

6.创建本地yum源配置文件

[root@localhost yum.repos.d]# vim local.repo

7.在local.repo中填写如下内容

[CentOS7.5]
name=CentOS7.5-local
baseurl=file:///iso
enabled=1
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7	

8.更新yum源配置

[root@localhost yum.repos.d]# yum clean all
Loaded plugins: fastestmirror, langpacks
Cleaning repos: CentOS7.5
Cleaning up everything
Maybe you want: rm -rf /var/cache/yum, to also free up
space taken by orphaned data from disabled or removed
repos
[root@localhost yum.repos.d]# yum makecache
Loaded plugins: fastestmirror, langpacks
CentOS7.5
| 3.6 kB
00:00
(1/4): CentOS7.5/group_gz
| 156 kB
00:00
(2/4): CentOS7.5/primary_db
| 3.1 MB
00:00
(3/4): CentOS7.5/filelists_db
| 3.1 MB
00:00
(4/4): CentOS7.5/other_db
| 1.2 MB
00:00
Determining fastest mirrors
Metadata Cache Created

9.使用yum repolist后如看到以下内容说明配置成功。

[root@localhost yum.repos.d]# yum repolist
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
repo id
repo name
status
CentOS7.5
CentOS7.5-local
3,894
repolist: 3,894

最后

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