Diff/head - not sure if this is the right command to use

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http://www.unix.com – Hi, I need some advise on whether there is a better way of doing what I am currently planning to do. Perhaps I should be using arrays instead of re-directing output to files? I need to use a tool/program named ADRCI provided by Oracle to remove trace files that it generates. Honestly it is not the best one to use but unfortunately the nature of the job calls for "WE MUST USE IT". Anyway, the tool has issues where even if I say purge files that are x-number of days old, it still was not able to delete some of the very old files. I am guessing that it may be checking something in (HowTos)