extracting the ip address from ifconfig


 
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# 1  
Old 09-29-2009
extracting the ip address from ifconfig

Hi
I am trying to create a script extracting the IP provided by ifconfig.
I tried with grep + awk but I am returned more than I need.

Code:
  
/sbin/ifconfig eth0 | grep "inet addr:" | awk '/inet addr:/ { print $2 }'

and returns

Code:
 
addr:10.15.1.64

How can I remove "addr:" string?
Thanks in advance
# 2  
Old 09-29-2009
awk can grep, no UUOC required.
Please post the output of
Code:
/sbin/ifconfig eth0

# 3  
Old 09-29-2009
Quote:
Originally Posted by manustone
Hi
I am trying to create a script extracting the IP provided by ifconfig.
I tried with grep + awk but I am returned more than I need.

Code:
  
/sbin/ifconfig eth0 | grep "inet addr:" | awk '/inet addr:/ { print $2 }'

and returns

Code:
 
addr:10.15.1.64

How can I remove "addr:" string?
Thanks in advance
Code:
A bit modification : 

/sbin/ifconfig eth0 | awk -F":" '/inet addr:/ { print $2 }'

# 4  
Old 09-29-2009
Code:
/sbin/ifconfig eth0 | grep "inet addr:" | awk '/inet addr:/ { print $2 }' | cut -d":" -f2

or
Code:
/sbin/ifconfig eth0 | grep "inet addr:" | awk '/inet addr:/ { print $2 }' | awf -F":" '{print $2}'

Smilie

Last edited by Franklin52; 09-29-2009 at 11:48 AM.. Reason: Please use code tags!
# 5  
Old 09-29-2009
Depending ifconfig's o/p this should also work:
Code:
ifconfig eth0 | awk -F":| +" '/inet adr/{print $4}'

If it doesn't work, post ifconfig's o/p.
# 6  
Old 09-29-2009
Quote:
Originally Posted by ainuddin
Code:
/sbin/ifconfig eth0 | grep "inet addr:" | awk '/inet addr:/ { print $2 }' | cut -d":" -f2

or
Code:
/sbin/ifconfig eth0 | grep "inet addr:" | awk '/inet addr:/ { print $2 }' | awf -F":" '{print $2}'

Smilie
Using grep and cut with awk is redundant but piping the result of an awk output to awk is ...Smilie

Smilie
# 7  
Old 09-29-2009
Code:
$ ifconfig eth0 | perl -ne 'if ( /inet addr:(^\s]+)/) { print $1; }'

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