Ubuntu12.04 cannot find softwaresource

Ubuntu12.04 cannot find softwaresource in systemsettings like Ubuntu11.04 or 11.10, but in synaptic) you can see that the system has installed software-properties-gtk. Why can't you see the software?

Ubuntu 12.04 cannot find the software source in system settings like Ubuntu 11.04 or 11.10, but in synaptic (the new software package, I do not know why the system does not bring this artifact, so you have to manually install it: sudo apt-get install synaptic) you can see that the system has installed software-properties-gtk. Why can't you see the software source?

I found a solution on the Internet: (from: Software Sources not found in Unity Dash Search)

(1) copy the desktop file of software sources to the local application Folder:

1. Mkdir-p ~ /. Local/share/applications
2. Cp/usr/share/applications/software-properties-gtk.desktop ~ /. Local/share/applications/

(2) edit the desktop file:

1. Gedit ~ /. Local/share/applications/software-properties-gtk.desktop

Set

1. NoDisplay = true

Change

1. NoDisplay = false

 (3) Save it, and click logout again!