To do upgrades in Debian
Code:
apt-get update
apt-get upgrade OR
apt-get upgrade <pkgname>
The second line would upgrade your whole system, the second upgrades a specific package.
I don't know about configuring eth1, my connection uses DCHP, so I don't to worry about that...
EDIT: To search for packagenames
Code:
apt-cache search <string>
string would be any combination of characters in the packagename.