[SOLVED] need help to avoid duplication while using grep

bal_nair1 · 04-18-2012, 12:20 AM

hi all,

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

say

I have file abc.txt

contains
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

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

but it causes duplication

and thus the output is
n xyz jik
n xyz jik

I want it to be

n xyz jik

looking forward for the reply

Thank you in advance

druuna · 04-18-2012, 12:28 AM

Hi,

With greps -m <num> option you can limit the amount of hits.

The following should limit the found string to one:

Code:

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

Hope this helps.

chrism01 · 04-18-2012, 12:31 AM

Code:

grep xyz abc.txt | uniq>def.t

http://linux.die.net/man/1/uniq

bal_nair1 · 04-18-2012, 12:38 AM

Thank you chrism.....its working....

druuna · 04-18-2012, 02:47 AM

You're welcome

BTW: Can you put up the [SOLVED] tag.
first post -> Thread Tools -> Mark this thread as solved

bal_nair1 · 04-18-2012, 03:31 AM

There is one FEA software known as Medina, which popups a message box in its GUI in its operation.I would like to access the information from the message box.For more clarity please see the image attached with this post.
I am suspecting whether any log file being wriiten in some directory corresponds to the message box.

druuna · 04-18-2012, 03:40 AM

@bal_nair1: This new question (post #6) isn't at all related to the original question you asked in this thread.

You might want to ask a moderator (use the report button) to split post #6 from the rest and make it a new thread. This way it gets the attention it deserves.

chrism01 · 04-18-2012, 07:04 PM

@druuna: trying to steal my applause eh