Linux的bash脚本来提取IP地址 [英] Linux bash script to extract IP address

问题描述

我想就我的Debian 7.3大脚本（有点像翻译以及更多新的用户友好的环境）。我有个问题。我只想使用一些命令给我的信息的。例如我的ifconfig如下：

I want to make big script on my Debian 7.3 ( something like translated and much more new user friendly enviroment ). I have a problem. I want to use only some of the informations that commands give me. For example my ifconfig looks like:

eth0      Link encap:Ethernet  HWaddr 08:00:27:a3:e3:b0  
          inet addr:192.168.1.103  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::a00:27ff:fea3:e3b0/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1904 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2002 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:1309425 (1.2 MiB)  T

我想只显示在线的IP地址：回声您的IP地址为：（IP地址）。是否有任何的命令，让我做这样的事情，在流来搜索信息我想？我知道的grep 和 SED 但我不跟他们真的很好。

I want to display only the IP address in line: echo "Your IP address is: (IP_ADDRESS )". Is there any command that allow me to do such a thing, to search in stream for informations I want to get?. I know about grep and sed but I am not really good with them.

编辑：首先说，感谢你帮我解决这个问题，现在我知道更多。其次要说的项目正在进行中。如果有人有兴趣只是下午我。

Firstly to say thank you for helping me with this problem, now I know much more. Secondly to say project is in progress. If anyone would be interested in it just pm me.

推荐答案

要刚刚获得你的IP地址：

To just get your IP address:

echo `ifconfig eth0 2>/dev/null|awk '/inet addr:/ {print $2}'|sed 's/addr://'`

这会给你的eth0的IP地址。

This will give you the IP address of eth0.

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