Please help I installed cairo dock and after that anythig realiting software synaptic, ubuntu software center, update manager) doesn't work when i try to install using terminal i get this mesageand yes I am root. please give me information on how to;E: Could not open lock file /var/lib/dpkg/lock - open (13: Permission denied)
E: Unable to lock the administration directory (/var/lib/dpkg/), are you root?
a) delete cairo dock through terminal.
b)fix whatever is wrong.
thanks in advance