I installed Ubuntu 11.10 from a live DVD. Then went for updating through Update Manager. It downloaded everything. During installing them the update manager crashed. It showed the error message:
The package catalog has broken. Installing or removing software is not possible until the package catalog is repaired.
However opting for repair didn't work and it continued showing the notification obstinately. I was undone.
Please show me how I can repair it.
apt-get update -f did not work. Problem still persists.
dpkg --configure -a did not remove the broken package. Nevertheless, I found details that the problem might be due to some third-party package. Now, how to check whether I am using any third-party package and if so how to disable them?