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Old 02-07-2012, 08:37 AM   #1
bryanwdly
LQ Newbie
 
Registered: Feb 2012
Posts: 2

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How to use sed to find lines with special characters


Given the following file content:

a|b|c|d|e
aa|bb|cc|d|e
x|y|z|c|e
x|y|c|f|r

Tried using the following sed command...but did not work

sed "/^.*|.*|c|/p" file

The correct output should be:

a|b|c|d|e
x|y|c|f|r

I am tring to find lines where c is in the third position.


Any suggestions?

Thanks

Last edited by bryanwdly; 02-07-2012 at 08:44 AM.
 
Old 02-07-2012, 09:56 AM   #2
trey85stang
Senior Member
 
Registered: Sep 2003
Posts: 1,091

Rep: Reputation: 41
do you have to use sed? awk would be a better choice...

Code:
$ cat test.txt 
a|b|c|d|e
aa|bb|cc|d|e
x|y|z|c|e
x|y|c|f|r
$ awk -F"|" '{if($3 == "c")print}' test.txt 
a|b|c|d|e
x|y|c|f|r

##And sed if you must....
$ sed "/^.*|.*|c|.*|.*/ ! d" test.txt 
a|b|c|d|e
x|y|c|f|r
Also the problem with your sed line... is you are matching the following in quotes... sed for the most part is greedy which is why you are getting the second line matched.
Code:
"a|b|c|"d|e
x|"y|z|c|"e
"x|y|c|"f|r

Last edited by trey85stang; 02-07-2012 at 10:03 AM.
 
1 members found this post helpful.
Old 02-07-2012, 01:54 PM   #3
bryanwdly
LQ Newbie
 
Registered: Feb 2012
Posts: 2

Original Poster
Rep: Reputation: Disabled
Not limited to sed will use awk

Thanks for the correction and insight...greatly appreciated...will build on my awk knowledge.
 
  


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