Linux get ip address bash

# ifconfig eth0 | grep inet | awk ‘‘ | sed ‘s/addr://’

Where eth0 is the interface you want to know the ip address. In my case was eth0. This will retrieve the Ip Address from the specified interface. If you have ipv6 active and you only use ipv4 Address, then add a grep . to the end of the sentence.
it would be like this:
root@azrael:

# ifconfig eth0 | grep inet | awk ‘‘ | sed ‘s/addr://’ | grep .

I use the above to retrieve the Ip address (dynamic one) from my ISP in order to forward the HTTP petitions to the web server (behind a firewall). Hope it works for you.

Thanks a lot, Alejandro

almost good:
ifconfig eth0 | grep ‘inet ‘ | awk ‘‘ | sed ‘s/addr://’

will work ->inet otherwise you will get an empty line from the inet6 line you grepped

is there any other option available to get ip address on linux

I simply issue a bash command:root@debian:

that’s why i typed two lines, the first one if you don’t have inet6 active on your server, and the second one if you do have it on.

# ifconfig eth0 | grep inet | awk ‘’ | sed ’s/addr://’ | grep . award Sep 24, 2010 @ 16:07

Hi,
in case someone still interested, i think easiest way to get local ip address is:
hostname -I (capital i)
this will return just the ip address with nothing else.

To get my external ip address (without use dyndns, noip & c) i use in a script:

This will write to /tmp/ip.txt my external ip and then i upload the text file with curl
to a directory on my web page

Bye
Award
——————
C u in /dev/null

HOW TO CHANGE IP,SUBNETMASK,GATEWAY,PLS SEND INFORMATION IM TRYING /etc/inet/hosts
/etc/inet/ipnodes THIS COMMAND BUT IS NOT WORK PLS HELP ME

Hi, I’m using RedHat Workstation 4 and would like to write a script to set the IP address, subnet mask and hostname of my machine. The same as Rahul.

How can i do this?
Thanks in advance.

A lot of the above example scripts/commands dont work corectly due to missformatting of the various Quote characters. Single quotes, double quotes and backticks are messed up.

` is a backtick – top left of the keyboard. Its used to go around a command thats ran.
export FOO=`ls`
puts the output of the ls command in the variable FOO

single Quote ‘ and double quotes ” are used in different places to go around arguments to commands. and to keep special chaacters from gettting parsed by the shell.

oops.. Watch out for the way this thread/forum alters the matching Quote to the single and double qupte if you cut and paste the examples. ie:

single Quotes ‘hello’

double quotes “hello”

back ticks `hello`

I had to manually alter the lines after i pasted them to use proper quoteing.

how to find the ip address of an website in linux

Hi
we have server configured on Linux.
Is there any way to get the IP Address of the client which is conncetd to that server.

IP=`who -m —ips | awk ‘‘`
Another syntax
IP=$(who -m —ips | awk ‘‘)

Kishore , go to Terminal, and say ‘ping yahoo.com’

ifconfig eth0 | grep inet | sed -n «s/^\s*inet addr://p» | awk ‘< print $1 >‘

Works on my Linux system

This one I have used on my Ubunut 9.04 system

# ifconfig eth0|grep «inet addr:»|awk ‘‘|awk -F : ‘‘

I like to use the simple and concise:
host $(hostname) | sed ‘s/.*has address //g’

It simply returns the IP address that the rest of the world sees for your machine.

@wuhaa @Alejandro\ Smith

Personally I prefer this version:
$ /sbin/ifconfig eth0 | sed ‘/inet\ /!d;s/.*r://g;s/\ .*//g’

real 0m0.027s
user 0m0.013s
sys 0m0.003s

real 0m0.009s
user 0m0.011s
sys 0m0.010s

real 0m0.005s
user 0m0.005s
sys 0m0.004s

The fewer processes, the faster the execution.

brill score! well done.

Excellent info on that.. thanks for updating this. That’s true, fewer processes translates into a faster execution.

Two years ago when i first posted on this faq with a “solution”, i was a new linux user, and i did not had any experience on this. I read some good information on bash scripting and came out with this solution for a problem i was having at that time.

I didn’t care back then if it was faster than other solutions, i just needed to solve the issue.. 😉 but of course, YOU are completely right with your point of view.

Thank you all for sharing your knowledge on this.

God bless you all.

Similar approach, but with Awk instead of sed:

Do some *nix implementations put a space after ‘addr:’ ? If so, this will break in those cases.

Excellent command to find the originating IP addresss
hostname -i

On my Ubuntu box, “hostname -i” does not give the same result as “host $(hostname)”.

Simples…
Work For me (Debian Lenny 5.0)
# ifconfig eth0 | grep inet | grep -v «inet6» | awk

Run it as
source

Now this works for Solaris 10
ifconfig -a

To find the ip address of Unix box from Unix prompt:

Here’s one that works (quickly) for me using cut:

A computer may have multiple network interfaces and therefore more than one ip-address you should try:

If you omit [dev] this command will give you a list of all IP-address and should work with English and German localization.

hostname -i is unpredictable in its result and nslookup $(hostname) will give you only what DNS knows about your machine.

its realy grtt i found my way thankss..

i have always the same result : inet iddr : 127.0.0.1

what could be the problem ) thank you

Just running the following

The result will be (on one line)

Then you can apply a simple filter on it to extract the IP

Sorry for the typos. Unable to re-edit my post.

I’m using cygwin on windows and a VPN. None of the above worked for me. I had to use the following command and some grep and sed commands

route print | egrep » 255.255.255.255.*123.123.123.123″ | sed ‘s/\s*\(.*\)255.255.255.255.*/\1/g’
### I’ve used 123.123.123.123 as a fictional router address.##

Explanation:
The vertical line, the pipe symbol, | , takes the output of everything on the left and feeds it to the command on the right. So the solution that works for me (the rest do not) involves essentially three commands – each of which that does something and parse things to the next step.

• route print : the main command of many things – over many lines
• egrep » 255.255.255.255.*123.123.123.123 : this selects a line that has the netmask at 255.255.255.255 then any characters as shown by the .* after the 255’s and then looks for my router’s address of 123.123.123.123.
• sed ‘s/\s*\(.*\)255.255.255.255.*/\1/g’ : sed command replaces/extracts text. basic use: ‘s/replace/withThis/g’ does a global search and replaces all references of replace with the string withThis. This sed command extracts the part of the line before the 255 part. It ignores leading spaces indicated by the \s and also anything after the 255 part shown by .* which is a shorthand for any character or number (the . part) that is found zero of more times (the * part). By placing part of the replace string in parentheses \(.*\) I am saying keep this part. So it’s the part after leading spaces and before the 255s. The \1 part is the replacement part of the sed command throws away all the other stuff and just keeps that part in parentheses and is displayed. This is the IP address on my machine.

Excelent post
i’m learning i’m learning .
:3

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