Command to examin the contents of files

[blueiceMD]

Does anyone know a command that will examine the contents of files and determine if they contain a particular expression? I have a feeling find may do this with a particular switch, but I cannot discern any such functionality from the man page. Thanks a lot.
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- md

[mark_alec]

grep
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www.gentoo.org.au || #gentoo-au

[blueiceMD]

Thanks a lot!

grep pattern `find path`

is the best thing ever!
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- md