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Top Forums UNIX for Dummies Questions & Answers Tool to suppress lines where value=0 Post 302620785 by putter1900 on Monday 9th of April 2012 07:51:31 AM
Old 04-09-2012
Quote:
Originally Posted by itkamaraj
use

Code:
 
awk '$1!=0'
 
or
 
iptables -nvL | awk '$1!=0 && $3~/DROP/'

ABSOLUTELY DEAD-ON!! Thanks so much for the clarification

Running either one against a static instance of iptables -nvl works like a charm, like this;

Code:
iptables -nvL | awk '$1!=0 && $3~/DROP/'|sort -rn -k1

For some reason (probably, I suspect, syntax-related in some way) I can't combine that with "watch" to produce the functional equivalent of a "live output"....and that remains an obstacle.

MANY thanks for your help, greatly appreciated!

putter

Last edited by Scrutinizer; 04-09-2012 at 09:03 AM.. Reason: code tags
 

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IPTABLES-SAVE(8)                                                  iptables 1.6.1                                                  IPTABLES-SAVE(8)

NAME
iptables-save -- dump iptables rules to stdout ip6tables-save -- dump iptables rules to stdout SYNOPSIS
iptables-save [-M modprobe] [-c] [-t table] ip6tables-save [-M modprobe] [-c] [-t table] DESCRIPTION
iptables-save and ip6tables-save are used to dump the contents of IP or IPv6 Table in easily parseable format to STDOUT. Use I/O-redirect- ion provided by your shell to write to a file. -M, --modprobe modprobe_program Specify the path to the modprobe program. By default, iptables-save will inspect /proc/sys/kernel/modprobe to determine the exe- cutable's path. -c, --counters include the current values of all packet and byte counters in the output -t, --table tablename restrict output to only one table. If not specified, output includes all available tables. BUGS
None known as of iptables-1.2.1 release AUTHORS
Harald Welte <laforge@gnumonks.org> Rusty Russell <rusty@rustcorp.com.au> Andras Kis-Szabo <kisza@sch.bme.hu> contributed ip6tables-save. SEE ALSO
iptables-apply(8),iptables-restore(8), iptables(8) The iptables-HOWTO, which details more iptables usage, the NAT-HOWTO, which details NAT, and the netfilter-hacking-HOWTO which details the internals. iptables 1.6.1 IPTABLES-SAVE(8)
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