probem while grep


 
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# 1  
Old 04-11-2008
Bug probem while grep

Hi ,

I used the floowing command in my script.

grep 'swi' file.txt | grep '^DEV' | cut -f 6 >> f.txt

Here file.txt contains fields of records.
My intension is to grep for the 3 letter 'swi' in one of filed, this field will contain swi as part of word.
And next grep is to grep for a 'DEV' field, this is a single field.

But the output Iam gettign nothing.

Plz help me.

Thanks.
# 2  
Old 04-11-2008
problem with grep.

This time I used the following command:

grep 'swi' file.txt | grep "DEV" | cut -f 6 >> f.txt

DEV word I kept in double quotes, as it should be single word, and this 3 letter word should not a part of any field.
# 3  
Old 04-11-2008
By field I am guessing you mean it is separated by spaces.

Code:
grep 'swi' file.txt | grep ' DEV ' | cut -f 6 >> f.txt

# 4  
Old 04-11-2008
Another version of jim solution, that handle DEV in first or last field :
Code:
grep 'swi' file.txt | egrep '(^|[[:space:]])DEV([[:space:]]|$)' | cut -f 6 >> f.txt

With awk :
Code:
awk '/swi/ && /(^|[[:space:]])DEV([[:space:]]|$)/ { print $6 }' file.txt >> f.txt

Jean-Pierre.
# 5  
Old 04-11-2008
problem with grep

Hi,

file.txt list of records of fields.

grep 'swi' file.txt | grep "DEV" | cut -f 6 >> f.txt

In above command 'swi' word is a part of field.

SO I have to grep for that field which has 3 latters swi.

Next grep for 'DEV', here DEV is another field and its alone field.Its not part of field.

Is the above syntax correct.
# 6  
Old 04-11-2008
Question Can you show a sample?

Something like this is much easier to understand when there is a smaple text file. Can you post a small piece for the file, as well as an example of what you hope to obtain as output?
# 7  
Old 04-11-2008
Your command grep records wich contains 'swi' and 'DEV' in any positions, for example all the following lines are matched :
Code:
switch the DEVICE
DEV is switched
key DEV not found in swi table

Show an example of input file with matching and not matching records, the the required output.

Jean-Pierre.
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