Let some command without input password

1) execute visudo to edit the script of sudoer
sudo visudo

2) add below text in editor, hit ctrl-x and 'Y' to save it
wnc ALL= NOPASSWD: /sbin/shutdown

Update Linux shared library

cp libxxx.so /usr/local/lib
ldconfig -v -n /usr/local/lib

touchscreen calibration

From: Tias 

There is now a generic touchscreen calibration utility that can 
calibrate evtouch, as well as evdev (the now preferred upstream driver 
for touchscreens) and others.

I've uploaded it to mentors and mailed:
http://lists.debian.org/debian-mentors/2010/08/msg00066.html

You can download a binary deb package on the website:
http://github.com/tias/xinput_calibrator/downloads

More info on the homepage:
http://www.freedesktop.org/wiki/Software/xinput_calibrator

from http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=450713