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There is date in my file, like 30-apr-2015. How can I compare this with the current date and get notified if they are equal?

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    Have you made an effort to write the script? If you have, please paste the portion of your code and the issue you are facing and we can help you.
    – rahul
    Commented Apr 8, 2015 at 11:43

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This code does the comparison and informs you by printing a message on the console where you typed the command:

[[ $(date +%Y%m%d -d $(< file)) == $(date +%Y%m%d) ]] && echo "wake up"

You may want to replace the echo by any other command that notifies you, e.g., use the command mail.

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