How to check diff between files and do action according to the result?

[Michael, Lior]

Hi , 
I have a cron file replacement job before day starts ,
Which afterwards I need to check if there's a difference between
Cron file .
If diff' action give no difference - only send trap 
If diff' gives non empty output - do manual copy and cron restart .

Thanks in advance ,
Best Regards,
Lior Michael
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