Simple Desktops is a collection of good desktop wallpapers with minimalistic design but not boring. These are not photographed, drop shadow and gradient free wallpapers which are very difficult to find around the web.
sudo /etc/init.d/gdm restart - restart X (GNOME)
sudo /etc/init.d/kdm restart - restart X (KDE)
(file) /etc/Xll/xorg.conf - display configuration
sudo dpkg-reconfigure -phigh xserver-xorg - reset X configuration
Ctrl+Alt+Bksp - restart X display if frozen
Ctrl+Alt+FN - switch to tty N
Ctrl+Alt+F7 - switch back to X display
sudo /etc/init.d/kdm restart - restart X (KDE)
(file) /etc/Xll/xorg.conf - display configuration
sudo dpkg-reconfigure -phigh xserver-xorg - reset X configuration
Ctrl+Alt+Bksp - restart X display if frozen
Ctrl+Alt+FN - switch to tty N
Ctrl+Alt+F7 - switch back to X display
sudo command - run command as root
sudo su - open a root shell
sudo su user - open a shell as user
sudo -k - forget sudo passwords
gksudo command - visual sudo dialog (GNOME)
kdesudo command - visual sudo dialog (KDE)
sudo visudo - edit /etc/sudoers
gksudo nautilus - root file manager (GNOME)
kdesudo konqueror - root file manager (KDE)
passwd - change your password
sudo su - open a root shell
sudo su user - open a shell as user
sudo -k - forget sudo passwords
gksudo command - visual sudo dialog (GNOME)
kdesudo command - visual sudo dialog (KDE)
sudo visudo - edit /etc/sudoers
gksudo nautilus - root file manager (GNOME)
kdesudo konqueror - root file manager (KDE)
passwd - change your password
Kevin Slavin argues that we're living in a world designed for -- and increasingly controlled by -- algorithms. In this riveting talk from TEDGlobal, he shows how these complex computer programs determine: espionage tactics, stock prices, movie scripts, and architecture. And he warns that we are writing code we can't understand, with implications we can't control.
A pseudo-element creates a phoney element and inserts it before or after the content of the element that you've targeted. They don't actually change anything in the document. Rather, they insert ghost-like elements that are visible to the user and that are style-able in the CSS.
To learn about the cool things you can do with pseudo-elements click here.