classes

QApplication
QWidget
QSpinBox
QSlider
QObject
QHBoxLayout
QLabel
QPushButton

styles

"windows", "motif", "cde", "plastique", "windowsxp", or "macintosh"

remote desktop

command:
rdesktop [ip]

change grub setting

sudo gedit /boot/grub/menu.lst

ubuntu terminal right click

sudo apt-get install nautilus-open-terminal

it is ready

everything is ready now,
i will turn into linux in the future,
that's cool~

channel 12 or 13 of wifi

when the ubuntu810 is newly installed on my laptop. the channel 12 and 13 is turned off because the OS think i am in a region where they are legal. how to turn them on? add the below line in "/etc/modprobe.d/options":

options cfg80211 ieee80211_regdom=EU