centos 7 中如何提取IP地址

 ifconfig |grep -Eo "(([1-9)?[0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5]).){3}([0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])"

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原文地址:https://www.cnblogs.com/alexlv/p/11810528.html