[root@eyeball etc]# apt-get install git-core
Reading Package Lists... Done
W: There are multiple versions of "mysql" in your system.

This package won't be cleanly updated, unless you leave
only one version. To leave multiple versions installed,
you may remove that warning by setting the following
option in your configuration file:

RPM::Allow-Duplicated { "^mysql$"; };

To disable these warnings completely set:

RPM::Allow-Duplicated-Warning "false";

W: You may want to run apt-get update to correct these problems
E: Invalid record in the preferences file, no Package header