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in reply to Re^5: Unix disk space reports
in thread Unix disk space reports

So you have step one done, collecting the time series data. You seem to have an error in your shell script because you create a file commandout.txt but mail a file output.txt.

The next steps would be

  1. Create a data structure from the report files
  2. Create reports from the data structure

Note that this site is not a program-request site. We will gladly help you with your programming problems, but we rarely provide programs that solve a complete problem.