[foxboro] Date/Time Arithmetic

Hi List,

Does anyone know of an easy way to do date/time arithmetic in a shell
script?  Specifically, what I need to do is get the current date and
time and then adjust it for an offset which can be either positive (add
nn minutes to the current date/time) or negative (subtract nn minutes
from the current date/time).  

Any info would be greatly appreciated.

Regards,
Terry

 
 
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