0 Set Fully Transparent Panel

When you set the panel to be transparent in the default Ambiance theme in Ubuntu, you will find that some panel items' backgrounds are not transparent, but you can make them transparent and consistent with others, following these steps:

1. Go to Applications (or Main Menu) > Accessories > Terminal.
2. Enter cp -R /usr/share/themes/Ambiance ~/.themes/
3. Enter gedit ~/.themes/Ambiance/gtk-2.0/apps/gnome-panel.rc (for Ubuntu 11.04 or 10.10) OR gedit ~/.themes/Ambiance/gtk-2.0/gtkrc (for Ubuntu 10.04), to open the file with gedit.
4. Search for this line bg_pixmap[NORMAL] = "img/panel.png" (for Ubuntu 11.04 or 10.10) OR bg_pixmap[NORMAL] = "panel_bg.png" (for Ubuntu 10.04)
5. Comment out the line by placing a # at the beginning of the line, like this: #   bg_pixmap[NORMAL] = ...
6. Save the file.
7. Go to System > Preferences > Appearance, switch to the other theme and then back to the Ambiance theme.

   If you'd to change to the New Wave theme, then enter cp -R /usr/share/themes/"New Wave" ~/.themes/ in step 2, enter gedit ~/.themes/"New Wave"/gtk-2.0/gtkrc in step 3, search for and comment out this line bg_pixmap[NORMAL] = "Images/Panel/PanelBarLong.png" in steps 4 and 5 respectively.

0 Customize the Panel

Ubuntu includes a top panel and a bottom panel by default. If you prefer to keep only one panel at the bottom just like the Windows Taskbar, then these are the steps to follow:

1. Delete the bottom panel: right-click over it and click "Delete This Panel".
2. Move the top panel to bottom: right-click over it, select "Properties" and change Orientation from "Top" to "Bottom".
3. Add running program buttons: right-click the panel, select "Add to Panel", scroll down and select "Window List", click "Add".
4. Replace the Menu Bar ("Applications-Places-System") with the "Main Menu" to save space in the panel:
   1. Right-click the "Menu Bar" and select "Remove From Panel".
   2. Right-click the panel, select "Add to Panel" and choose "Main Menu", click "Add".
   3. Right-click the items (Firefox, etc) and untick "Lock to Panel".
   4. Right-click the added "Main Menu", select "Move" to relocate it to the far left.

These are basic changes. The panels are much more flexible than the Windows Taskbar in that many items in the panels can be easily added, removed or configured.
   The Main Menu shows the "Lock Screen", "Log Out" and "Shut Down" items if you remove the "Indicator Applet Session" item (which shows your username and the shutdown button to the right of the panel). These three items are hidden from the Main Menu when the Indicator Applet Session item is on the panel.
   If you need to restore the panels to the original state, enter the following commands into the Terminal and re-start the system:

1. sudo gconftool-2 --shutdown
2. sudo rm -rf .gconf/apps/panel
3. sudo pkill gnome-panel

   At any point if your customized desktop settings caused a problem and you wish to reset all back to their defaults, then enter this command sudo rm -rf .gnome .gnome2 .gconf .gconfd .metacity in the Terminal, log out and log back in to the system.

0 How Safety Way When Your Ubuntu Hang or Jammed

Have you ever experienced something that pissed computer jammed or hang? If that happens what do you do? Mmm, perhaps most of us will press the power button for a few seconds to turn off the computer, then turn it on again, or for PC users can basically press the restart button. Is this method safe? Mmm, from the news they regularly listen to, this way is not safe because it could potentially destroy the hard-disk & other computer devices. Then how to restart your computer safe when jammed? Here's how!

When Ubuntu jammed or Hang, actually what's so error? Mmm, most of the incident was caused by the X server to crash, not the kernel Linux. X Server - is trivial - is a "component" in Linux that runs on the desktop graphical display, X servers also handle keyboard input, mouse, and output to the monitor. That is why when the X Server jammed or hang, keyboard and mouse do not respond. Well, the solution is to "give up" control of the keyboard directly into the kernel so that we can control the system by keyboard (including restart). Okay, enough introduction, go directly to the discussion.

First of all, make sure you have activated a feature called Kernel can "magic SysRq key" by typing the following command in Terminal [ press ctrl + alt + t for Terminal shortcut ] 

cat /proc/sys/kernel/sysrq 

If the output is "1" then the feature is active, if not then change the value to "1" by typing the following command:

sudo echo "1" > /proc/sys/kernel/sysrq  

Well, when the computer jammed or hang, please restart by pressing the key combination Alt + SysRq while keeping both keys, press the following buttons in sequence (give pause between the better):

reisub  

Then the computer will restart the process.

What really happened? The combination Alt + SysRq tell the system that we want to govern kernel directly, while the other buttons:

•    r - handing control of the keyboard from the X Server to the kernel, so that we can "govern" Kernel directly.

•      e - send a signal "terminate" the entire process so that they close themselves. This process sometimes takes time, so give pause for a moment to process.

•      i - send a signal "kill" the entire process so that they were forced to close.

•      s - flush (can be said store) data from cache to disk

•      u - mount the entire file system becomes read-only

•      b - restart the computer.

0 Android Jelly Bean 4.1

Google has announced that the then type of it’s hugely widespread mobile operating classification Android wish be called “Jelly Bean”. This is in charge with the tradition of baptism all OS type, Jelly Bean being 4.1, later a dessert in alphabetical array. So the then Android type wish almost certainly be named later a dessert initial with K, get a hold the drift? Jelly Bean is the evolution of the Android OS which is now frequent for both phones and medication. Google has announced that the opening Jelly Bean devices wish convey in July. Roughly of the devices are the Galaxy Nexus phone, the Motorola Xoom pill and Google’s very private Nexus 7 pill. So let’s have a come across at altogether the shiny new stuff, shall we?

The new Android packs in a mass of new skin, the a good number noticeable of which is what Google calls “Project Butter UI”. This rather idiosyncratic bigwig refers to Google’s shot to formulate the UI on altogether Android devices “fast, fluid and smooth” by triple buffering graphics.Another good new item is Google Now. It’s mostly a foretelling app that gathers data from the internet and observes your day after day dull to impart related in sequence. For exemplar, you container in words of one syllable state “sports” and Google Now would put on view you altogether your darling set scores, imminent matches and the akin to. Or in day after day animation, you container state “traffic” and it would buttress for interchange beside your day after day road and alert with reference to in the least delays previously. Let’s just state Google Now makes Android devices more….sentient, shake. In any case, it’s a super cool item that we can’t pass the time to observe. What’s more integrated are new tone of voice monitor skin that make progress and add further functionality to the offered set of skin. Now tone of voice key is likely devoid of concerning to the internet too. The residential home barrier is what’s more changed, assume a change for the better app launcher and further interactive notifications, a la Windows Phone.