Listing files without specific expression in the file

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http://www.unix.com – I am running Ubuntu 11.10 I have the following files. Code: geo2503r05690585.html  geo2503r06020612.html geo2503r06250641.html geo2503r06490658.html  geo2503r06830686.html  geo2503r05860601.html  geo2503r06130624.html  geo2503r06420648.html  geo2503r06590682.html  geo2503r06870687.html In each of them there should be a line with the following statement: Code: bla bla bla bla bla href=../../../../geopdf/geo bla bla bla bla bla I want to check all the files. I want to know which files do not contain this pattern in the file, so that I c (HowTos)