grep options (unix)

Posted by lego69 on Stack Overflow See other posts from Stack Overflow or by lego69
Published on 2010-06-02T07:36:02Z Indexed on 2010/06/02 7:43 UTC
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hello everyone, can You explain please, can grep pick rows if at least one element from the list appeared, for exmaple

grep "hello world" file1 

grep must give me all rows which have or word hello or world or both of them, thanks in advance

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