mkdir /mnt/iso

编辑/etc/fstab，添加如下行

/tool/xxx.iso  /mnt/iso  iso9660  loop,ro,auto 0 0

编辑/etc/yum.repos.d/rhel-source.repo

[rhel-source]

name=Red Hat Enterprise Linux $releasever - $basearch - Source

baseurl=file:///mnt/iso/

enabled=1

-------------------centos ----------------------------------

[Local]

name=LocalYum

baseurl=file:///mnt/iso

gpgcheck=1

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

enabled=1