正则表达式匹配的MAC地址(Regex matching MAC address)

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应用场景
查看kvm虚拟机IP地址

virsh dumpxml centos7-test |grep -Eo '([0-9a-fA-F]{2}[:]){5}([0-9a-fA-F]{2})' | xargs -I{} echo 'arp -a | grep "{}"' | sh