[lug] grep question

Jonathan Briggs zlynx at acm.org
Tue Jan 29 12:56:40 MST 2002

Scott A. Herod wrote:

>A quick grep question:  I've got a file named "spam" that may contain
>"hello", "goodbye", both or neither.
>I need a grep command that returns true if either or both is present.
>The grep man page suggests that you can use the infix operator |
>(the pipe symbol) but I can't figure out the syntax.  Does anyone
>know how?
>I basically want something like:
>grep 'hello!good' spam
>Web Page:  http://lug.boulder.co.us
>Mailing List: http://lists.lug.boulder.co.us/mailman/listinfo/lug
I believe you need to use either egrep or grep -E (they're both the same 
thing).  Then, egrep 'hello|goodbye' will work.

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