Need to search string from file 1 in one of columns of file 2

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http://www.unix.com – hello all. I would like to kindly ask you, if you could help me out with one problem. I have two files -> for ex. file1 and file2 file1 contains only various numbers file 2 contains multiple columns with various values What i need is to take every single number, one by one, from file 1 and check if this number occurs in column 5 of file 2 - doesnt matter if it occurs for several times file 1 Code: 49000186672011                                                  (HowTos)