制作基于阿里云base、epel等源的离线仓库ISO镜像文件

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[root@localhost ~]#curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo

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[root@localhost ~]#curl -o /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
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[root@localhost ~]#yum clean all
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[root@localhost ~]#yum makecache

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#查询reposync包含在哪个软件包内
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[root@localhost ~]#yum provides reposync
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#下载yum-utils工具箱，包含reposync命令
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[root@localhost ~]#yum -y install yum-utils

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[root@localhost ~]#yum -y install createrepo

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[root@localhost ~]#du -sh /data/repo
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48G    /data/repo

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#把/repo目录下的RPM软件包做成离线yum库
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[root@localhost ~]#createrepo -v /data/repo

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[root@localhost ~]# ll /data/repo
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total 16
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drwxr-xr-x. 3 root root 4096 Mar  3 23:19 base
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drwxr-xr-x. 3 root root 4096 Mar  4 00:03 epel
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drwxr-xr-x. 3 root root 4096 Mar  4 21:57 extras
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drwxr-xr-x. 3 root root 4096 Mar  4 22:00 updates

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#查询包含mkisofs工具的软件包
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[root@localhost ~]#yum provides mkisofs
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#genisoimage软件包含mkisofs工具，安装genisoimage
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[root@localhost ~]#yum -y install genisoimage
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#创建存放ISO镜像文件的目录
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[root@localhost ~]#mkdir /data/iso
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[root@localhost ~]#cd /data/iso
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#使用mkisofs工具制作ISO镜像文件，镜像名称为：epel.iso
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[root@localhost iso]#mkisofs -r -o epel.iso /data/repo/
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#制作完毕后，查看epel.iso文件
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[root@localhost iso]#ls -lh