cd /home/iso/
mount -o loop CentOS-7-x86_64-DVD-1511.iso /home/iso/
mv /etc/yum.repos.d /etc/yum.repos.d.bak
mkdir /etc/yum.repos.d
vi /etc/yum.repos.d/CentOS-local.repo
#本源的名字(不能和其他重復(fù))
[base-local]
name=CentOS7.2-local
#步驟2中掛載鏡像創(chuàng)建的目錄
baseurl=file:///home/iso
#啟動yum源: 1-啟用 0-不啟用
enabled=1
#安全檢測: 1-開啟 0-不開啟
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
yum clean all
yum makecache