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Docking your ubuntu


Cairo-dock  is a pretty, light and convenient interface to your desktop, able to replace advantageously your system panel!

 It features  multi-docks,  taskbar,  launchers  and  a  lot  of  useful applets.
 Applets can be detached from the dock to act as desktop widgets.
 Numerous  ready-to-use  themes  are downloadable in 1 click, and can be
 easily customized at your convenience.It can use hardware acceleration    (OpenGL) to be very fast  and  low  on CPU.

 It's  recommended to install the PLUG-INS package ( cairo-dock-plug-ins) to have access  to  more  views,  dialogues  and  many  plug-ins  an applets.
 You can get it from the software--center or 
open a terminal and type:
sudo apt-get install cairo-dock
Add it to the startup items :

Cairo-dock offers plenty of interesting features and pretty effects. Find out how to improve your desktop with Cairo-Dock!
    • Control your dock with DBus you can even write applets with DBus
    • Replace Unity with Cairo-Dock
    • Cairo-Dock Session Use Cairo-Dock as a session manager (new)
    • Cairo-Dock and Gnome-Shell Cairo-Dock within Gnome-Shell (new)
    • Cairo-Dock and Unity Cairo-Dock within Ubuntu's Unity (new)
    • A complete tutorial How to customise your dock
    • Tip and Tricks If you need to customise your dock even more
    • Remove the last Gnome Panel A quick tutorial for Gnome2

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How to setup a wifi-hotspot in Ubuntu: The terminal way.

Ubuntu has a "Use as hotspot" mode. But it creates a n ad-hoc network only.Wireless hotspots aren't same as ad hoc networks. Significant difference is there. In short, ad hoc networks aren't supported in most Android, Windows Phone and Blackberry devices (and may be iOS devices too) whereas AP mode Wi-Fi hotspots are.

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sudo ap-hotspot start
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Unable to lock the administration directory (/var/lib/dpkg/) is another process using it?

Some times we get the following error while trying yo install software using apt-get or synaptic packaging manager.
E: Could not get lock /var/lib/dpkg/lock - open (11 Resource temporarily unavailable)
E: Unable to lock the administration directory (/var/lib/dpkg/) is another process using it?

How can we resolve this?
The problem occurs if we are running another applications like synaptic using the directory. So, if this is the case close the applications and try run the command again.
You will also get this message if you forget to use  sudo  when executing an apt command. You can use sudo lsof /var/lib/dpkg/lock to find the process that owns the lock file Then try to kill the process to remove the lock.
This should be used as last resort. If you use this carelessly you can end up with a broken system.
You can delete the lock file with the following command:
sudo rm /var/lib/apt/lists/lock

You may also need to delete the lock file in the cache directory.
sudo r…