Would you please tell me in step-by-step format, how may I solve the following number(s) of issues? My Pinguy OS 12.04 has a broken Synaptic Package Manager and Update Manager which is virtually inactive because so many unavailable Software Sources & outdated depositories are listed within it? I don't know how or where to update the lists. ![Sad Sad]()
Whenever I try the following... (issues)
1. Install software via Gdebi-gtk or Ubuntu Software Center
2. Update or refresh my synaptic package manager & related programs on Pinguy OS 12.04, I get the following error message:

Whenever I try the following... (issues)
1. Install software via Gdebi-gtk or Ubuntu Software Center
2. Update or refresh my synaptic package manager & related programs on Pinguy OS 12.04, I get the following error message:
Quote:Software Index broken
This is a major failure of your software management system. Please check for broken packages with synaptic, check the file permissions and correctness of the file '/etc/apt/sources.list' and reload the software information with: 'sudo apt-get update' and 'sudo apt-get install -f'.