what is a filter ? WExplain any five filters in unix Post: 302191233

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LEARN ABOUT DEBIAN

tracestats

TRACESTATS(1)							   User Commands						     TRACESTATS(1)

NAME

       tracestats - perform simple analysis on a trace

SYNOPSIS

       tracestats [ -f | --filter bpf ]... inputuri...

DESCRPTION

       tracestats  reads  one  or  more  traces  and  outputs summaries for each trace of how many packets/bytes match each bpf filter, as well as
       totals.	If instead of doing this for the entire trace, but to do it for portions then use tracertstats(1) instead.

       -f bpf-filter
       --filter bpf-filter
	      Add another bpf filter

EXAMPLES

       tracestats --filter 'host sundown' 
	    --filter 'port http' 
	    --filter 'port ftp or ftp-data' 
	    --filter 'port smtp' 
	    --filter 'tcp[tcpflags] & tcp-syn!=0' 
	    --filter 'not ip' 
	    --filter 'ether[0] & 1 == 1' 
	    --filter 'icmp[icmptype] == icmp-unreach' 
	    erf:/traces/trace1.gz 
	    erf:/traces/trace2.gz 

LINKS

       More details about tracestats (and libtrace) can be found at http://www.wand.net.nz/trac/libtrace/wiki/UserDocumentation

SEE ALSO

       libtrace(3), tracemerge(1), tracefilter(1), traceconvert(1), tracesplit(1), tracesplit_dir(1), tracereport(1),  tracertstats(1),  tracepkt-
       dump(1), traceanon(1), tracesummary(1), tracereplay(1), tracediff(1), traceends(1), tracetopends(1)

AUTHORS

       Perry Lorier <perry@cs.waikato.ac.nz>

tracestats (libtrace)						   October 2005 						     TRACESTATS(1)