remove duplicating lines

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# 1  
Old 09-22-2009
remove duplicating lines


i have a webserver logfile and want to count how many page views there have been.
I was thinking about removing lines that begin with the same user and same date&time, because it indicates they were just looking at one page and multiple hits were counted.
My question is how do I do this? I know how to remove lines that are completely alike (with uniq), but the problem is the lines aren't exactly alike, just the beginning.
for example, if you have:
i don't know how.
i don't know this.
how do i make sure the second line gets removed, because it begins with the same word(s)?
# 2  
Old 09-22-2009
for you example:
$more kk2.txt 
i don't know how.
i don't know this.
i don't know other
i don't know one more
$sort -t" " -k3,3 -u kk2.txt 
i don't know how.

# 3  
Old 09-22-2009
if i do that, i'll get two lines back:
$ sort -t" " -k3,3 -u kk2.txt

i don't know how.\
i don't know this.\

i tried it with my logfile and it does the same, giving two lines back instead of one..?
# 4  
Old 09-22-2009
can you copy/paste the content of your file?
look in man page for command sort in your system:
man sort

the command in my enviorement work's,
$cat /etc/issue; echo $SHELL
Red Hat Enterprise Linux AS release 3 (Taroon Update 6)
Kernel \r on an \m

# 5  
Old 09-22-2009
assume you want uniqueness on the first 4 fields
awk '!arr[$1 $2 $3 $4]++'  filename > uniq.file

add or subtract the $n field specifiers as needed.
# 6  
Old 09-22-2009
it still gives me two lines back, also when i use the command

$ awk '!arr[$1 $2 $3 $4]++' kk1.txt > uniq.file
awk '!arr[$1 $2 $3 $4 $5]++' kk1.txt > uniq.file
awk '!arr[$1 $2 $3]++' kk1.txt > uniq.file

the content of my file is quite big, but it pretty much comes down to this:

Code: - - [19/Jul/2006:07:56:25 +0200] "GET /MoodViews/javascript.js HTTP/1.1" 200 343 "" "Mozilla/5.0 (X11; U; Linux i686; en-US; rv: Gecko/20060508 Firefox/" - - [19/Jul/2006:07:56:25 +0200] "GET /MoodViews/images/menu_bg.png HTTP/1.1" 200 153 "" "Mozilla/5.0 (X11; U; Linux i686; en-US; rv: Gecko/20060508 Firefox/" - - [19/Jul/2006:07:56:25 +0200] "GET /MoodViews/images/button_selected.png HTTP/1.1" 200 511 "" "Mozilla/5.0 (X11; U; Linux i686; en-US; rv: Gecko/20060508 Firefox/" - - [19/Jul/2006:07:56:25 +0200] "GET /MoodViews/images/button_normal.png HTTP/1.1" 200 507 "" "Mozilla/5.0 (X11; U; Linux i686; en-US; rv: Gecko/20060508 Firefox/" - - [19/Jul/2006:07:56:25 +0200] "GET /MoodViews/Moodfeeds/Moodstickers/sticker-linear-bottom-tiny.png HTTP/1.1" 200 2070 "" "Mozilla/5.0 (X11; U; Linux i686; en-US; rv: Gecko/20060508 Firefox/"

where i want to remove the last 4 lines, because they start with the exact same IP-adress and date&time as the first line.

Last edited by Franklin52; 09-22-2009 at 09:14 AM.. Reason: Please use code tags!
# 7  
Old 09-22-2009

awk '!a[$1$4]++' file

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