multiple search with grep - Shell Programming and Scripting

amon · #1 (**permalink**) 04-03-2006

is it possible to execute multiple search with grep???

grep criteria1 criteria2 file

something like this...

I know other way:

grep pattern1 file-name1 > results-file
grep pattern2 file-name1 >> results-file
cat results-file

but can it be done with one grep????

Klashxx · #2 (**permalink**) 04-03-2006

grep -E "criteria1|criteria2" file

amon · #3 (**permalink**) 04-03-2006

thanks I will try

manthasirisha · #4 (**permalink**) 04-03-2006

Or there is:

grep -e "pattern1" -e "pattern2" file

Abhishek Ghose · #5 (**permalink**) 04-04-2006

You can try grep -f too....u can generalise that way, for multiple patterns

PradeepRed · #6 (**permalink**) 04-04-2006

egrep "pattern1|pattern2|.....|patternn" filename

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