ifconfig返回的信息中包括IP地址，但要在Shell中获取当前IP地址，则要麻烦一些
获取方法
由于不同系统中ifconfig返回信息的格式有一定差别，故分开讨论：[1]
Linux:
LC_ALL=C ifconfig | grep 'inet addr:'| grep -v '127.0.0.1' |
cut -d: -f2 | awk '{ print $1}'
FreeBSD/OpenBSD:
LC_ALL=C ifconfig | grep -E 'inet.[0-9]' | grep -v '127.0.0.1' |
awk '{ print $2}'
Solaris:
LC_ALL=C ifconfig -a | grep inet | grep -v '127.0.0.1' |
awk '{ print $2}'
三段代码的原理类似，都是先获取含有IP的行，再去掉含有127.0.0.1的行。最后获取IP所在的列
样例代码
下面是一则示例的代码[2]：
#!/bin/sh # Shell script scripts to read ip address # ------------------------------------------------------------------------- # Copyright (c) 2005 nixCraft project <http://cyberciti.biz/fb/> # This script is licensed under GNU GPL version 2.0 or above # ------------------------------------------------------------------------- # This script is part of nixCraft shell script collection (NSSC) # Visit http://bash.cyberciti.biz/ for more information. # ------------------------------------------------------------------------- # Get OS name OS=`uname` IO="" # store IP case $OS in Linux) IP=`ifconfig | grep 'inet addr:'| grep -v '127.0.0.1' | cut -d: -f2 | awk '{ print $1}'`;; FreeBSD|OpenBSD) IP=`ifconfig | grep -E 'inet.[0-9]' | grep -v '127.0.0.1' | awk '{ print $2}'` ;; SunOS) IP=`ifconfig -a | grep inet | grep -v '127.0.0.1' | awk '{ print $2} '` ;; *) IP="Unknown";; esac echo "$IP"
http://linux-wiki.cn/wiki/zh-hans/Shell%E4%B8%AD%E8%8E%B7%E5%8F%96%E5%BD%93%E5%89%8DIP%E5%9C%B0%E5%9D%80