How to get network-manager icon back ubuntu 14.04?

Question

ubuntu

Hello. I decided to install an indicator of hardware sensors - Hardware Sensors, downloaded the deb file

wget -O indicator-sensors_0.1-1_i386.deb http://goo.gl/268Jo

I run it through the console
sudo dpkg -i indicator-sensors_0.1-1_i386.deb
, it displays an error, okay, I opened it through the ubuntu application center, displays the error window restore software, clicked restore, rebooted, the network-manager icon and other icons disappeared. The Ubuntu Software Center somehow got deleted too. Internet and all other programs work. The icons just don't show up.
This is how the tray looks like, where the icons should be.

Tried different ways, does not help.

Answer 1

displays an error window restore software, clicked restore

I believe that it is he who is going to restore you did not look.
What for? Just think, the floor of the system can be demolished because you decided to install some garbage from a suspicious site.
Try this:
This should install just about everything that comes with Ubuntu out of the box, and read carefully what it says.