Need help in grep


 
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# 1  
Need help in grep

hi all,

I would like to grep without duplication, what should I do,

say

I have file abc.txt

contains
Code:
n xyz jik
n xyz jik

I have another file def.txt

what command I should use in script to copy n xyz jik once from abc.txt to def.txt

right now I am using

Code:
grep -i "xyz" $abc >>$def

but it causes duplication

and thus the output is
Code:
n xyz jik
n xyz jik

I want it to be

Code:
n xyz jik

looking forward for the reply

Thank you in advanceSmilie

Moderator's Comments:
Mod Comment Welcome to the UNIX and Linux Forums. Please use code tags. Video tutorial on how to use them

Last edited by Scrutinizer; 04-18-2012 at 03:05 AM..
# 2  
See if your requirement is print or store the unique value of 2nd Column (I assume delimiter is space) the below is your solution:

Code:
awk '!A[$2]++{print $0}' abc.txt > def.txt

# 3  
Quote:
Originally Posted by bal_nair
hi all,

I would like to grep without duplication, what should I do,

say

I have file abc.txt

contains
Code:
n xyz jik
n xyz jik

I have another file def.txt

what command I should use in script to copy n xyz jik once from abc.txt to def.txt

right now I am using

Code:
grep -i "xyz" $abc >>$def

but it causes duplication

and thus the output is
Code:
n xyz jik
n xyz jik

I want it to be

Code:
n xyz jik

looking forward for the reply

Thank you in advanceSmilie

Moderator's Comments:
Mod Comment Welcome to the UNIX and Linux Forums. Please use code tags. Video tutorial on how to use them
try this
Code:
# grep -i -m 1 "xyz" $abc >>$def

# 4  
using grep command

Hi,
You can make use of the below command line for your expected output.

Quote:
grep -i "xyz" $abc|sort |uniq >>$def
Sanjay.

---------- Post updated 04-19-12 at 12:32 PM ---------- Previous update was 04-18-12 at 04:21 PM ----------

Hi,

I am totally disagree for the query ygemici has posted.

Code:
grep -i -m 1 "xyz" $abc >>$def

above one is wrong one.

if the content of the file abc is like below.

Code:
n xyz jik
n xyz jik
a abc def
a abc def
c xyz nmp
n xyz nmp
k p r
k p r
k p r
t yy q
t yy q
t yy q
t yy q
t yy q

then it is only returning the first row of the xyz partened line. so it is totally worng .
now with a simple file content
Code:
t xyz rm
p xyz rm

and for above content if we will use Ygemici's command line .it gives
Code:
t xyz rm

which is aboutlutely worng.

thankx,
Sanjay.


Moderator's Comments:
Mod Comment Please use code tags, thanks!

Last edited by zaxxon; 04-19-2012 at 06:47 AM.. Reason: code tags, see PM
# 5  
@Sanjay, did you mean to phrase your post like that? A little more courteous choice of words would be appreciated, please read the rules, particularly rule #1 and #2, which you agreed to when you registered, if you have not already done so.

Thank You.

The UNIX and Linux Forums.
# 6  
Quote:
Originally Posted by sanjay.login
Hi,
You can make use of the below command line for your expected output.


Sanjay.

---------- Post updated 04-19-12 at 12:32 PM ---------- Previous update was 04-18-12 at 04:21 PM ----------

Hi,

I am totally disagree for the query ygemici has posted.

Code:
grep -i -m 1 "xyz" $abc >>$def

above one is wrong one.

if the content of the file abc is like below.

Code:
n xyz jik
n xyz jik
a abc def
a abc def
c xyz nmp
n xyz nmp
k p r
k p r
k p r
t yy q
t yy q
t yy q
t yy q
t yy q

then it is only returning the first row of the xyz partened line. so it is totally worng .
now with a simple file content
Code:
t xyz rm
p xyz rm

and for above content if we will use Ygemici's command line .it gives
Code:
t xyz rm

which is aboutlutely worng.

thankx,
Sanjay.


Moderator's Comments:
Mod Comment Please use code tags, thanks!
Smilie
i think,you dont understand some things..
but i really want to help if you want to more learn.

regards,
ygemici
# 7  
comments on Ygemici's post.

@Ygemici.

Every body in this world does not understand something (I am not an exception).
To err is human. But to accept the error is the real quality of a human.

Ok if you think your post is correct then ok I have nothing to say.

@forum

I am sorry to write like this but I could not stop when somebody wants to fight.

thanks & regards,
Sanjay.
 

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