top panel:

http://www.linuxandlife.com/2012/05/ubuntu-panel-transparent.html

window title bar and menu(in the comment):

http://ubuntuguide.net/ubuntu-unity-enable-transparent-panel-and-windows-title-bar

http://www.jameswigley.com/2012/04/27/making-ubuntu-unity-look-beautiful-by-enabling-transparency/

in Ubuntu 12.04, just

gnome-desktop-item-edit —create-new ~/Desktop

type in name and command, click on the icon on the left to configure icon picture

First, go to your chrome apps page, and right-click on the app you would like to add to desktop, and select ‘Create Shortcut’.

Next, check the ‘Desktop’ and press ‘Create’.

Now, you can see a icon of the app on your desktop. If you wanna put it in launcher, just drag the icon to launcher. This is what it looks like:

You can also create desktop shortcut for website with an icon(if you can put up with the low and ugly resolution, as is shown in the above picture). All you need to do is to drag the bookmarked website from bookmark bar to apps page, and then go to the first line of this post.

btw, I was using KSnapshot to capture the images of screen.

first:

sudo apt-get remove —purge pidgin

then, open your home, show all hiden files, find the .puple folder and finally remove this folder.

if:

• your laptop is unreasonably hot and the fan is running at full speed all the time;
• or you would like to save your battery when AC is not plugged in.

to install:

sudo apt-get install laptop-mode-tools

to configure:

sudo gedit /etc/default/acpi-support

sudo gedit /etc/laptop-mode/laptop-mode.conf

to control in terminal:

sudo laptop_mode start

sudo laptop_mode stop

try :

Ctrl + Super + Left / Right

and you can maximize/restore the window by:

Ctrl + Super + Up / Down

it’s useful to review all the shorcuts at Settings>Keyboard

for COPY:

Ctrl + Shift + C

for PASTE:

Ctrl + Shift + V

use command line to adjust the brightness of laptop screen (when you cannot find any other way to adjust the brightness):

sudo setpci -s 00:02.0 F4.B=30

‘30’  is the value of brightness. Smaller the number is, the darker the screen is. The minimum is 00, and the maximum is FF.

However, the change is not saved, if you wanna save your change, you should

sudo gedit /etc/rc.local

insert a row of code right above the ‘exit 0’

setpci -s 00:02.0 F4.B=**