如何在 Linux 和 OS X 上获取本地机器的主 IP 地址? [英] How to get the primary IP address of the local machine on Linux and OS X?

问题描述

我正在寻找一个命令行解决方案，它可以返回本地主机的主要(第一个)IP 地址，而不是 127.0.0.1

I am looking for a command line solution that would return me the primary (first) IP address of the localhost, other than 127.0.0.1

该解决方案应该至少适用于 Linux(Debian 和 RedHat)和 OS X 10.7+

The solution should work at least for Linux (Debian and RedHat) and OS X 10.7+

我知道 ifconfig 在这两个平台上都可用，但它的输出在这些平台之间不太一致.

I am aware that ifconfig is available on both but its output is not so consistent between these platforms.

推荐答案

使用grep从ifconfig中过滤IP地址:

Use grep to filter IP address from ifconfig:

ifconfig |grep -Eo 'inet (addr:)?([0-9]*.){3}[0-9]*' |grep -Eo '([0-9]*.){3}[0-9]*' |grep -v '127.0.0.1'

或者使用sed:

ifconfig |sed -En 's/127.0.0.1//;s/.*inet (addr:)?(([0-9]*.){3}[0-9]*).*/2/p'

如果你只对某些接口感兴趣，比如 wlan0、eth0 等，那么:

If you are only interested in certain interfaces, wlan0, eth0, etc. then:

ifconfig wlan0 |...

例如，您可以将 .bashrc 中的命令别名为创建您自己的名为 myip 的命令.

You can alias the command in your .bashrc to create your own command called myip for instance.

alias myip="ifconfig | sed -En 's/127.0.0.1//;s/.*inet (addr:)?(([0-9]*.){3}[0-9]*).*/2/p'"

更简单的方法是hostname -I(hostname -i 用于旧版本的hostname，但请参阅注释).但是，这仅适用于 Linux.

A much simpler way is hostname -I (hostname -i for older versions of hostname but see comments). However, this is on Linux only.

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