grep and sed exact match questions


 
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# 1  
Old 05-24-2012
grep and sed exact match questions

This was mistaken as homework in a different forum, but is not. These are questions that are close to what I am trying to do at work.

QUESTION1:
How do you grep only an exact string. I am using Solaris10 and do not have any GNU products installed.

Contents of car.txt
Code:
CAR1_KEY0
CAR1_KEY1
CAR2_KEY0
CAR2_KEY1
CAR1_KEY10

CURRENT COMMAND LINE: WHERE VARIABLE CAR_NUMBER=1 AND KEY_NUMBER=1
Code:
grep ^CAR$CAR_NUMBER"_KEY"$KEY_NUMBER car.txt

OUTPUT:
Code:
CAR1_KEY1
CAR1_KEY10

OUTPUT WANTED (HOW DO I ONLY GET THIS):
Code:
CAR1_KEY1


QUESTION2:
I have a similar problem with sed (find and replace) using the same input file car.txt.

COMMAND LINE: WHERE VARIABLE CAR_VALUE=1000
Code:
sed 's/^CAR'$CAR_NUMBER'_KEY'$KEY_NUMBER'.*/CAR'$CAR_NUMBER'_KEY'$KEY_NUMBER' '$CAR_VALUE'/1' car.txt > new_car.txt

OUTPUT:
Code:
CAR1_KEY0
CAR1_KEY1 1000
CAR2_KEY0
CAR2_KEY1
CAR1_KEY1 1000

OUTPUT WANTED (HOW DO I ONLY GET THIS):
Code:
CAR1_KEY0
CAR1_KEY1 1000
CAR2_KEY0
CAR2_KEY1
CAR1_KEY10


Last edited by Franklin52; 05-24-2012 at 05:23 AM.. Reason: Please use code tags
# 2  
Old 05-24-2012
Question 1: ( $ here denotes the end of the grep pattern )
Code:
$ grep ^CAR$CAR_NUMBER"_KEY"$KEY_NUMBER$ car.txt

Sorry, I am not clear about the 2nd question ..
 
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