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Grep for ip address only from a file

 
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# 1  
Old 01-05-2016
Grep for ip address only from a file
Facing issues in grepping only the IP Address from a file i have tried the below and it was of not much help


Code:
awk -F"[<>]" '/(/ { print $3 }'


Code:
awk -F"</*(>" '/ip/ { print $2 }'


Code:
grep "ip" file1|cut -f2 -d"<"|cut -f2 -d">"


Code:
grep "(" file1 |cut -f2 -d"<"|cut -f2 -d">"


Code:
grep -e '^[1-9][0-9]\.[1-9][0-9]\.[1-9][0-9][]0-9]\.[1-9][0-9][]0-9]' file1


Code:
egrep "10.*" file1


the contents of the file is



Code:
/exp/abc110.20.20.21(rw,nohide,sync,insecure,root_squash,no_subtree_check)10.25.22.21(rw,nohide,sync,insecure,root_squash,no_subtree_check)10.25.22.26(rw,nohide,sync,insecure,root_squash,no_subtree_check)
/exp/ad110.24.18.30(rw,nohide,sync,insecure,root_squash,no_subtree_check)10.56.34.33(rw,nohide,sync,insecure,root_squash,no_subtree_check)
/exp/ab110.56.22.23(ro,sync,nohide,insecure,no_subtree_check)10.56.22.27(ro,sync,nohide,insecure,no_subtree_check)
/exp/be110.24.89.60(ro,sync,nohide,insecure,no_subtree_check)10.56.22.20(ro,sync,nohide,insecure,no_subtree_check)
/exp/dc110.27.23.10(ro,sync,nohide,insecure,no_subtree_check)10.56.22.26(ro,sync,nohide,insecure,no_subtree_check)


grep for ip address alone from a file

---------- Post updated at 03:33 PM ---------- Previous update was at 03:27 PM ----------

i have even tried these

Code:
egrep -o '[0-9]+[.][0-9]+[.][0-9]+[.][0-9]+/[0-9]+' file1

Code:
awk '{match($0, /[0-9]+\.[0-9]+\.[0-9]+\.*[0-9]+\/[0-9]+/); print substr($0, RSTART, RLENGTH)}'  file1

still the output is not there .. i need the output of only IP's.

Moderator's Comments:
Mod Comment edit by bakunin: please use CODE-tags as required by the forum rules? Thank you!
# 2  
Old 01-05-2016
How about
Code:
grep -o ")[0-9.]*(" file | tr -d ')('
10.25.22.21
10.25.22.26
10.56.34.33
10.56.22.27
10.56.22.20
10.56.22.26

# 3  
Old 01-05-2016
First: tools like grep will not help you because they filter certain lines (in which a certain regexp is found) only without modifying them. If you want only the IP addresses alone with no other text surrounding you need to some text-modifying tool like sed (or awk, perl, ...).

Having said this: you first need to clarify what an "IP-Address" (per your definition) is. For instance: an unsigned integer 1-256, followed by a triplett of unsigned integers 0-256, preceeded by a dot:

Code:
[1-256]  .[0-256]  .[0-256]  .[0-256]

Now, this definition would cover an "IP-Address" like "1.0.0.0", which would not be a valid address of a host (it would be the network address of the 1/8 net).

On the other hand, changing the definition to cover this, like:

Code:
[1-256]  .[0-256]  .[0-256]  .[1-256]

would invalidate an address like 10.1.1.0, which would be a valid address in the network 10.1/16.

So, the question is: which level of "rule-adherence" would you like to build into your regexp?

I hope this helps.

bakunin
This User Gave Thanks to bakunin For This Post:
satishcarya
# 4  
Old 01-05-2016
grep for /(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/

Code:
cat <filename> |grep (\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})

Last edited by Don Cragun; 01-13-2016 at 04:08 AM.. Reason: Add CODE and ICODE tags.
This User Gave Thanks to girijajoshi For This Post:
satishcarya
# 5  
Old 01-05-2016
Code:
perl -lne 'print if s/.*?(\d+\.\d+\.\d+\.\d+)\D*/ $1/g' file1

Your egrep attempt was close:
Code:
egrep -o '[0-9]+[.][0-9]+[.][0-9]+[.][0-9]+' file1

Last edited by MadeInGermany; 01-05-2016 at 01:39 PM..
This User Gave Thanks to MadeInGermany For This Post:
satishcarya
# 6  
Old 01-05-2016
IP groups for each line:

Code:
perl -nle '@ip=/(\d+\.\d+\.\d+\.\d+)/g and print "@ip"' file1

Code:
110.20.20.21 10.25.22.21 10.25.22.26
110.24.18.30 10.56.34.33
110.56.22.23 10.56.22.27
110.24.89.60 10.56.22.20
110.27.23.10 10.56.22.26

Each IP in its own line:

perl -nle 'while(/(\d+\.\d+\.\d+\.\d+)/g){print $1}' file1
Code:
110.20.20.21
10.25.22.21
10.25.22.26
110.24.18.30
10.56.34.33
110.56.22.23
10.56.22.27
110.24.89.60
10.56.22.20
110.27.23.10
10.56.22.26

All the IPs in line:

perl -nle 'push @ip, /(\d+\.\d+\.\d+\.\d+)/g; END{print "@ip"}' file1
Code:
110.20.20.21 10.25.22.21 10.25.22.26 110.24.18.30 10.56.34.33 110.56.22.23 10.56.22.27 110.24.89.60 10.56.22.20 110.27.23.10 10.56.22.26

These 2 Users Gave Thanks to Aia For This Post:
MadeInGermany satishcarya
# 7  
Old 01-07-2016
Quote:
Originally Posted by satishcarya
[..]
i have even tried these

Code:
egrep -o '[0-9]+[.][0-9]+[.][0-9]+[.][0-9]+/[0-9]+' file1

Code:
awk '{match($0, /[0-9]+\.[0-9]+\.[0-9]+\.*[0-9]+\/[0-9]+/); print substr($0, RSTART, RLENGTH)}'  file1

still the output is not there .. i need the output of only IP's.
[..]
From these I gather that besides ip addresses you also want to collect IP CIDR ranges. If so, you were close:

Code:
egrep -o '[0-9]+[.][0-9]+[.][0-9]+[.][0-9]+(/[0-9]+)?' file1

or

Code:
grep -Eo '([0-9]+[.]){3}[0-9]+(/[0-9]+)?' file1

This User Gave Thanks to Scrutinizer For This Post:
satishcarya
 
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