Hi all... If you have/havent seen Neil Coetzers demonstrations on our <a href="http://ubuntu.org.zw">ubuntu.org.zw</a> facebook page,..ubuntu can use a onboard/usb webcam for user authentication on your desktop. so when you turn on your machine, and the login prompt comes up.. instead of you having to type a password... it pops up with a webcam feed.. which prompts you into moving closer to the camera...it scans your face, and if its okay... logs you in. if it doesnt log you in, it drops you into a plain old password login. i've been using this for the last couple of days.. and i find it to be EXTREMELY useful.. especially since im one of those people who hate being prompted for passwords everytime i want to do something that the computer deems as dangerous. installing this function can be a little complicated.. so i've drawn up a little how-to.. that can be followed step by step. its quite easy to setup if you follow my instructions..... but you need to make sure your machine is connected to the internet before trying this, as it need to download packages from the web. i noticed that there is quite alot of downloading involved with my method... but if you connected to our local repository.. it should'nt be much of an issue..on a broadband connection: righto! basically, you will be installing opencv, and a face-pam-authentication module to get this to work.... just follow everything step by step..and you should be fine... run these commands within a terminal logged in as YOU.. NOT root!! (applications->accessories->terminal) - install opencv 1 - sudo add-apt-repository ppa:gijzelaar/opencv2 2 - sudo apt-get update 3 - sudo apt-get install opencv - install documentation/dev files/python module (optional) 1 - sudo apt-get install libopencv-dev 2 - sudo apt-get install python-opencv 3 - sudo apt-get install opencv-doc - install pam-face-authentication module prerequisites 1 - sudo apt-get install build-essential cmake qt4-make libx11-dev libcv-dev libcvaux-dev libhighgui4 libhighgui-dev libqt4-dev libpam0g-dev - install pam-face-authentication module 1 - cd /tmp 2 - wget <a href="http://pam-face-authentication.googlecode.com/files/pam-face-authentication-03.tar.gz">http://pam-face-authentication.googlecode.com/files/pam-face-authentication-03.tar.gz</a> 3 - tar zxf pam-face-authentication-03.tar.gz && cd pam-face-authentication-* 4 - mkdir build && cd build 5 - cmake -D CMAKE_INSTALL_PREFIX=/usr .. 6 - make 7 - sudo make install - configure pam-face 1 - turn on your webcam! then in the terminal, type "qt-facetrainer" and press enter 2 - follow the trainer to make images of yourself(the more the better..and more secure it becomes) - enable pam-face on login 1 - sudo sed -i 'li auth sufficient pam_face_authentication.so enableX' /etc/pam.d/su 2 - sudo sed -i 'li auth sufficient pam_face_authentication.so enableX' /etc/pam.d/sudo - If using GNOME (GDM) 1 - sudo sed -i 'li auth sufficient pam_face_authentication.so enableX' /etc/pam.d/gdm 2 - sudo sed -i 'li auth sufficient pam_face_authentication.so enableX' /etc/pam.d/gnome-screensaver - If using Kubuntu (KDE) 1 - sudo sed -i 'li auth sufficient pam_face_authentication.so enableX' /etc/pam.d/kde finally reboot.. and enjoy this new feature!! p.s i've set this up on Ubuntu 10.04 desktop, and it runs perfectly with the above instructions... i havent tested this on any other version. please be advised that I take no responsibility for any issues that may happen during/after you run these steps, and If you do follow the above instructions, and come across issues, please dont contact me and ask for help, because i did not develop this application, rather i have just laid out the installation in an easy to understand manner. This authentication module installation is not recommended for high security systems.. or machines with sensitive data. you are advised to install this at your own risk! if you are not sure if this is for you or not, please take heed.. and do not try this! :) <style type="text/css">pre.cjk { font-family: "DejaVu Sans",monospace; }p { margin-bottom: 0.</style> kalpesh.