Replying to a message of Richard Webb to Paul Quinn:

 RW> DAta in this case is information on vessels offshore.
 RW> The system receives the information, when found the batch
 RW> invoked uses sed to grab all data and none of the header
 RW> stuff to the current file.

 RW> NExt scheduled event, new current file, of course.  Purge
 RW> the file with data over 48 hours old.

I'd keep five or six different directories, one for current, the others
for successively older.  Every 12 hours delete everything in the oldest
and move everything else down one directory.

 RW> WHen another user requests this info by email, or I want to
 RW> have a look at it, all files are combined into one text
 RW> file.

copy *.txt whatever.out will append all the text files in a directory together
into the .out file.

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