When sidebar(unity) disappeared in Ubuntu

우분투에서 사이드바가 사라졌을 때 아래와 같이 처리.

in a terminal:

export DISPLAY=:0   
sudo dconf reset -f /org/compiz/

and then

setsid unity

I hope it'll be useful.

http://askubuntu.com/questions/17381/unity-doesnt-load-no-launcher-no-dash-appears