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→by logical operators
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* {{kbd | key = <nowiki>grep 'pattern1\|pattern2' file_name </nowiki>}} | * {{kbd | key = <nowiki>grep 'pattern1\|pattern2' file_name </nowiki>}} | ||
* {{kbd | key = <nowiki>grep -E 'pattern1|pattern2' file_name </nowiki>}} | * {{kbd | key = <nowiki>grep -E 'pattern1|pattern2' file_name </nowiki>}} | ||
* {{kbd | key = <nowiki>cat file_name | grep -E 'pattern1|pattern2'</nowiki>}} | |||
'''AND''': match the lines which contains ''pattern1'' AND ''pattern2'' | '''AND''': match the lines which contains ''pattern1'' AND ''pattern2'' | ||
* {{kbd | key = <nowiki>awk '/pattern1/&&/pattern2/' file_name </nowiki>}} for {{Linux}} | * {{kbd | key = <nowiki>awk '/pattern1/&&/pattern2/' file_name </nowiki>}} for {{Linux}} | ||
* {{kbd | key = <nowiki>grep -E 'pattern1.*pattern2|pattern2.*pattern1' file_name </nowiki>}} {{exclaim}} order dependent | * {{kbd | key = <nowiki>grep -E 'pattern1.*pattern2|pattern2.*pattern1' file_name </nowiki>}} {{exclaim}} order dependent | ||
* {{kbd | key = <nowiki>cat file_name | grep -E 'pattern1.*pattern2|pattern2.*pattern1' </nowiki>}} {{exclaim}} order dependent | |||
=== Search text in single plain text file === | === Search text in single plain text file === | ||