how to resolve these problems to install synaptic package manger in Ubuntu 12.04?

Question

E: Could not get lock /var/lib/apt/lists/lock - open (11: Resource temporarily unavailable)
E: Unable to lock directory /var/lib/apt/lists/
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?

Answer 1

open your terminal with CTRL+ ALT+T and paste these commands one-by-one.

    sudo rm -rf /var/lib/apt/lists/lock
    sudo rm -rf /var/lib/dpkg/lock
    sudo apt-get install synaptic

hope that helps.