如何从 ifconfig 输出中 grep IP 地址

如何从 ifconfig 输出中 grep IP 地址

以下是我的 ifconfig 输出

eth0      Link encap:Ethernet  
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
          Interrupt:28 Base address:0x2000 

eth1      Link encap:Ethernet  
          inet addr:192.168.1.2  Bcast:192.168.1.255  Mask:255.255.255.0
      UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:36497 errors:0 dropped:0 overruns:0 frame:14515
          TX packets:44884 errors:1352 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:20781745 (20.7 MB)  TX bytes:17776225 (17.7 MB)
          Interrupt:17 Base address:0xc000 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:12 errors:0 dropped:0 overruns:0 frame:0
          TX packets:12 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:720 (720.0 B)  TX bytes:720 (720.0 B)

virbr0    Link encap:Ethernet  
          inet addr:192.168.122.1  Bcast:192.168.122.255  Mask:255.255.255.0

          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:24 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 B)  TX bytes:4416 (4.4 KB)

vmnet1    Link encap:Ethernet 
          inet addr:192.168.185.1  Bcast:192.168.185.255  Mask:255.255.255.0

          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:24 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

vmnet8    Link encap:Ethernet  
          inet addr:192.168.207.1  Bcast:192.168.207.255  Mask:255.255.255.0

          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:25 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

如何使用grep提取每个LAN卡对应的IP地址?

这可能吗?如何实现?

答案1

$ ip -o addr show | awk '/inet/ {print $2, $3, $4}'
lo inet 127.0.0.1/8
lo inet6 ::1/128
eth0 inet 192.168.0.1/24
eth0 inet6 fe80::2a0:feed:dead:beef/64

答案2

哦天哪,我忍不住想尝试一下提高我的 perl oneliner 脚本能力当我看到这样的帖子时。这是第一次黑客尝试:

$ /sbin/ifconfig | \
perl -ane "(\$n)=(/^(\S+)/) and print \"\$n: \"; print (/addr:(\S+)/) and print \"\n\" if /inet/"
eth0: 192.168.0.11
lo: 127.0.0.1

这可能需要进一步严格,而且它还存在很多问题,例如它不能处理 IPv6 地址等等。

答案3

我是这样做的:

ETHERADD=$(/sbin/ifconfig |grep -e ^[a-z] |grep -v lo | awk '{ printf $1 FS}')

for i in $ETHERADD  
do
    IP=$(/sbin/ifconfig $i | grep -o '[0-9]*\.[0-9]*\.[0-9]*\.[0-9]*' | head -1)
    printf "%-16s%-42s*\n" "IP $i:"      "$IP"
done

答案4

这是我使用的

#!/bin/bash
interfaces=$(/sbin/ifconfig |grep -e ^[a-z] |  awk '{ printf $1 " "}')
for i in $interfaces
do
    addr=$(/sbin/ifconfig $i | grep 'inet addr:' | cut -d: -f2 | awk '{ print $1}')
    addr6=$(/sbin/ifconfig $i | grep 'inet6 addr:' |sed 's/   *//g'| cut -d' ' -f3 | cut -d'/' -f1)
    echo "$i  inet4 $addr    inet6 $addr6"
done

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