Dell Proximity Printing Solution - Manual (Page 20)

DPPS – Installation Guide 20
Updating Ubuntu
After you can properly retrieve a static IP address, perform an update to the
latest packages.
If you are installing Ubuntu using an ISO image, skip to "Downloading,
Installing, and Configuring the DPPS Server Package" on page 21.
To update Ubuntu, type the following commands in a terminal window:
sudo aptitude update && sudo aptitude upgrade
You must remove two packages from the system as they interfere with the
processes needed by CUPS.
1 Type the following command in a terminal window:
sudo aptitude remove apparmor apparmor-utils
2 Type the root account password.
3 Press Enter when prompted.
Installing the Postfix Mail Server
If you are installing Ubuntu using an ISO image, skip to "Installing Using ISO
Image" on page 22.
Type the following command in a terminal window to set up a mail server for
E-Mail functionality:
sudo aptitude install postfix
After the mail server is installed, you are prompted for configuration. It is
recommended that you leave the default settings of Internet with Smarthost.