symbol count in a text file [iptables log]

[David A. Bandel]

On Sat, 21 Sep 2002 10:09:40 +0800
begin  "m.w.chang" <mwchang at netvigator.com> spewed forth:

> further to my questino on an analysis tool for iptables log.
> 
> is there a unix textutils or alike that would count the number of unique
> symbols in a text file and produce a frequency distribition of them? It 
> should be a common feature in most compilers. I could write one, but 
> just wonder whether the wheel has been available already.
> 
> with that tool, I could just count the symbol DPT=9999.
> 
> Reminded me of the book I dare to read: The C Compiler. Is this a kind 
> of lexical analysis?

grep DPT=9999 /var/log/messages | wc

But you'll probably only want one day at a time, in which case, you could
pipe the first grep through another grep for the date:

grep DPT=9999 /var/log/messages | grep "Sep 15" | wc

(note, on single digit dates, you need two spaces between the month/day
"Sep  9")

Ciao,

David A. Bandel
-- 
Focus on the dream, not the competition.
		-- Nemesis Racing Team motto