How to upgrade packages on command-line Ubuntu installation

To bring a command line Ubuntu installation up to date with the most current versions of all packages:

sudo aptitude update
sudo aptitude safe-upgrade
sudo aptitude full-upgrade

To upgrade your Ubuntu Server from 7.04 to 7.10 follow these few steps and you’ll be presented with a menu that will walk you through the upgrade process.

sudo aptitude install update-manager-core
sudo do-release-upgrade

How to fix unsupported personality problem with HP LaserJet 1012

Copied from a forum posting:

First, I downloaded the pxl1010.ppd from

http://linuxprinting.org/show_printer.cgi?recnum=HP-LaserJet_1012

and copied it to the /etc/cups/ppd/ directory. It's the third link in the "Drivers" section of the page, and there's a brief description of how the problem was fixed.