Grep for lines with X and Y

Sepia · #1 (**permalink**) 06-24-2009

Is it possible to grep for lines in a file that have two strings?

I am grepping a tail -f of a file.

I want to display the full line or all lines with cat and dog in them

#tail -f log.log | grep cat and dog

Any ideas?

Thanks.

chatwizrd · #2 (**permalink**) 06-24-2009

tail -f log.log | egrep -i 'cat|dog'

vidyadhar85 · #3 (**permalink**) 06-24-2009

awk will do.

Code:

tail -f filename|awk '/cat/&&/dog/{print}'

jim mcnamara · #4 (**permalink**) 06-24-2009

if you can have cat ... dog and/or dog .. cat:
one way:

Code:

tail -f somefile | grep cat | grep dog

if cat always comes before dog
one way:

Code:

tail -f somefile | grep 'cat.*dog'

Sepia · #5 (**permalink**) 06-24-2009

Quote:

Originally Posted by chatwizrd

tail -f log.log | egrep -i 'cat|dog'

Are you sure that is not or rather than and? It is showing lines with just one string in.

vidyadhar85 · #6 (**permalink**) 06-24-2009

Quote:

Originally Posted by chatwizrd

tail -f log.log | egrep -i 'cat|dog'

that will search cat OR dog not cat AND dog

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Bits Awarded / Charged to chatwizrd for this Post
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06-24-2009	mr.applesauce	N/A	50,000

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