Takes pictures when someone enters a wrong password
$ git clone https://github.com/Spockuto/caught
$ cd caught
$ ./install
Make the following changes in /etc/pam.d/common-auth
auth [success=3 default=ignore] pam_unix.so nullok_secure
Increment the number by 1. Add the following line right under it.
auth [default=ignore] pam_exec.so seteuid /usr/local/bin/caught