Grepping text from one file in another file

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http://www.unix.com – Hello, I have a file with a large number of words each listed in sequential order one word per line. Quote: a b c d I want to search these words in another file which has the structure Quote: a=x b=y c=p e=q Both the files are large, but the words in the sourcefile are all available in the target file. I tried to grep the data using grep, but the older grep (8 bit) which supported such a procedure, is not supported in new grep.: grep 32 bit. Maybe the syntax is different but I (HowTos)