How to do logical AND and logical OR with grep

Needhelp2 · #1 (**permalink**) 09-20-2008

Hi can someone please help me on this.

I need to perform this code:

Grep any lines that meets the following criteria

(A AND B) OR (A AND C)

I tried this code, but it didn’t work

Grep-I "A &&B" | "A&&C" *.* [~/foldername]$

thanks in advance

vidyadhar85 · #2 (**permalink**) 09-20-2008

you want this..

Quote:

grep 'A' filename|grep 'B' || grep 'A' filename |grep 'C'

or... this..

Quote:

grep 'A' filename|grep 'B' &&grep 'A' filename |grep 'C'

frank_rizzo · #3 (**permalink**) 09-20-2008

here is an alternate way to do it with awk.

Code:

awk '/A/ && /B/ || /A/ && /C/' filename

yahyaaa · #4 (**permalink**) 09-20-2008

try this also ...

egrep '(A)(B|C)' input_file

Regards

Needhelp2 · #5 (**permalink**) 09-20-2008

thanks , but egrep didnt work for me

error message " egrep is not recognized as an internal or external command"

could this be , due to cygwin??

vidyadhar85 · #6 (**permalink**) 09-20-2008

Quote:

Originally Posted by Needhelp2

thanks , but egrep didnt work for me

error message " egrep is not recognized as an internal or external command"

could this be , due to cygwin??

ya i think in cygwin only simple grep works.....

Franklin52 · #7 (**permalink**) 09-20-2008

The awk solution should work, try to place the and statements between parenthesis:

Code:

awk '(/A/ && /B/) || (/A/ && /C/)' filename

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