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Top Forums UNIX for Beginners Questions & Answers Filtering netstat command output Post 303042065 by sravani25 on Thursday 12th of December 2019 02:38:22 PM
Old 12-12-2019
Filtering netstat command output

Hi All,


I am trying to collect the listen ports info from netstat command in centos 7

From that info i am trying to collect all the foreign address IP for those ports.


I am using below script to do the same.


Code:
netstat -an |grep -w  "LISTEN" |grep -v "127.0.0.1" |awk '{print $4}' > /tmp/q1

sed 's/::/ALL/g' /tmp/q1 > /tmp/q2

for i in $(cat /tmp/q2 |awk -F ":" '{print $2}' |sort |uniq);do


abc=$(netstat -an |grep -w  "ESTABLISHED" |grep -v "127.0.0.1" | awk -v chr="$i" '$4 ~ chr'|awk '{print $5}' |awk -F ":" '{print $1}'|sort |uniq)

echo "$abc"


done


I am getting the required output now.


OUPUT :



Code:
192.168.20.232
192.168.10.114
192.168.10.175
192.168.10.183
192.168.10.7
192.168.10.93
192.168.20.120
192.168.20.154
192.168.20.170



my questions are

1) Now i want to ignore these ports records and print remaining records.
I tried with by changing the syntax of below variable in the script



Code:
abc=$(netstat -an |grep -w  "ESTABLISHED" |grep -v "127.0.0.1" | awk -v  chr="$i" '$4 !~ chr'|awk '{print $5}' |awk -F ":" '{print $1}'|sort  |uniq)

but it's printing duplicate values
Can someone please help me on this issue

Last edited by Scrutinizer; 12-12-2019 at 04:19 PM.. Reason: code tags please
 

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pydhcplib.ipv4(3)						     PYDHCPLIB							 pydhcplib.ipv4(3)

NAME
pydhcplib.ipv4 - Type for IP addresses version 4 SYNOPSIS
from pydhcplib.type_ipv4 import ipv4 a = ipv4() a = ipv4(string) a = ipv4(strlist) a = ipv4(int) DESCRIPTION
The class pydhcplib.ipv4 is a type "IP address version 4". It's used for string processing like "192.168.0.4". The class creation argument can be a string like "192.168.0.4". The class creation argument can be a list of bytes like [192,168,0,4]. METHODS
The implemented methods in this class are mostly methods of comparison (= =, >, etc...) else : str() return data converted into a printable string. list() return data converted into a list of bytes. int() return data converted into an 4 bytes int. EXAMPLES
Example program ipv4_example.py : from pydhcplib.type_ipv4 import ipv4 address = ipv4() address1 = ipv4("192.168.0.1") address2 = ipv4("10.0.0.1") address3 = ipv4([192,168,0,1]) print "a0 : ",address print "a1 : ",address1 print "a2 : ",address2 print "a3 : ",address3 if address1 == address2 : print "test 1 : ",address1, "==",address2 else : print "test 1 : " ,address1, "!=",address2 if address1 == address3 : print "test 2 : ", address1, "==",address3 else : print "test 2 : ", address1, "!=",address3 SEE ALSO
pydhcp(8), pydhcplib.hwmac(3), pydhcplib.ipv4(3), pydhcplib.strlist(3), pydhcplib.DhcpPacket(3), pydhcplib.DhcpBasicPacket(3), pydhc- plib.DhcpNetwork(3), pydhcplib.DhcpClient(3), pydhcplib.DhcpRawClient(3), pydhcplib.DhcpDerver(3) BUGS
See http://pydhcplib.tuxfamily.org/ for more information. AUTHOR
Mathieu Ignacio (mignacio[AT]april.org) pydhcplib.ipv4(3)
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