Parse ifconfig to get only my IP address using Bash

Question

I want to edit the bashrc file to have a simple function called \"myip\" to run. As you might guess, the function myip prints only my internal IP address of my machine.

Answer 1

Code working on VDS/VPS too:

ifconfig | grep -A2 "venet0:0\|eth0" | grep 'inet addr:' | sed -r 's/.*inet addr:([^ ]+).*/\1/' | head -1

or

ifconfig | grep 'inet addr:' | grep -v 127.0.0.1 | head -n1 | cut -f2 -d: | cut -f1 -d ' '

Answer 2

You can use awk to do both the selecting of the inet line and the parsing of the IP address like so:

$ ip addr ls docker0 | awk '/inet / {print $2}' | cut -d"/" -f1
172.17.42.1

In the example above, substitute the device handle eth0 in for docker0. Also, if you want a pure AWK implementation, you can do the "cutting" within like so:

$ ip addr ls docker0 | awk '/inet / {split($2, ary, /\//); print ary[1]}'
172.17.42.1

Answer 3

After troubles with greping ifconfig I found a wrapper library to simplify my life

pip install my_ip 
mip

Answer 4

Use:

ifconfig enops3 | greb broadcast | cut -d " " -f10

Where enops3 is the interface name.

Answer 5

Well, after hours of struggling I finally got it right:

ifconfig en1 | awk '{ print $2}' | grep -E -o "([0-9]{1,3}[\.]){3}[0-9]{1,3}"

That last part I had missing is just grep a pattern of IP addresses from my list.

Answer 6

You can also try this

user@linux:~$ cat script.sh
ifconfig | grep ad.*Bc | cut -d: -f2 | awk '{ print $1}'
user@linux:~$ 

Output

user@linux:~$ ./script.sh
192.168.1.1
10.0.1.1
user@linux:~$

Please take note that ifconfig output might be different depending on your linux version. Hence, you might want to change the script accordingly.

Btw, this is my ifconfig output

user@linux:~$ ifconfig 
eth0      Link encap:Ethernet  HWaddr 00:00:00:00:00:10  
          inet addr:192.168.1.1  Bcast:192.168.56.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:112 errors:0 dropped:0 overruns:0 frame:0
          TX packets:93 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:14616 (14.2 KiB)  TX bytes:17776 (17.3 KiB)

eth1      Link encap:Ethernet  HWaddr 00:00:00:00:00:11
          inet addr:10.0.1.1  Bcast:10.0.1.255  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: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)

user@linux:~$