Exporting Software Sources and keys

[rafita]

I have added several PPAs and their respective auth keys to my netbook. Is it possible to, say, export this info to a text file so that I can use the same in my office computer? (Both are running Lucid).

[dv3500ea]

Software sources are already kept in a text file. Simply copy the file /etc/apt/sources.list from one computer to another

[rafita]

Ah, yes, thanks!, but what about the authorization keys?
The problem I have is that, for some reason that escapes me, I can never import a key using the connection in my office. At home I have no problem.