logical operators in grep

ahmedb72 · 12-14-2009, 12:14 PM

Hi,
How can I implement logical operators in grep? I checked the man info and couldn't figure it out.

For example, I'd like to display lines in file1.txt that contains word1 OR word2.

cat file1.txt | grep word1 OR word2

Thanks in advance.

SethsdadtheLinuxer · 12-14-2009, 01:30 PM

try the --regexp flag.

Tinkster · 12-14-2009, 01:43 PM

grep -E "word1|word2" file1.txt

No need to swing cats =}

ghostdog74 · 12-14-2009, 07:55 PM

another tool you can use is awk,
ORing

Code:

awk '/WORD1|WORD2/' file

ANDing

Code:

awk '/WORD1/&&/WORD2/' file