This time, we have to set up two programs: the mailer and the motion detection system. The former, used to send the alarm e-mail message, is very simple and easy to set up; while the latter, used to implement the intrusions detection system, is a bit more complicated due to the fact that it supports tons of different devices and features.
As requested by this project, we should alert the user about possible intrusions by sending them an e-mail. There exists several ways to send an e-mail on a UNIX-like system, and the most commonly used is the
echo "Test message" | mail -s "test mail" email@example.com
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