Setting up the software
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.
Setting up the mailer
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 mail command that is called with the following command:
echo "Test message" | mail -s "test mail" email_address@somedomain.com
Note
For further information about the mail program, the reader can take a look at its man pages (using the man mail command) or start reading about it at https://en.wikipedia.org/wiki/Mail_%28Unix%29.
The real problem is that this command relays on the system mailer, which is the real...
