HowTo: Upgrade Debian Lenny to Squeeze

To upgrade a Debian system from Lenny (5.0) to Squeeze (6.0), you need to follow these steps:

1. Update the package list:

sudo apt-get update

1. Upgrade the packages:

sudo apt-get upgrade

1. Change the sources.list file to the new version of Debian:

sudo nano /etc/apt/sources.list

Replace "lenny" with "squeeze" in all lines.

1. Update the package list again:

sudo apt-get update

1. Upgrade the system:

sudo apt-get dist-upgrade

1. After the upgrade is complete, it's a good idea to clean up the system:

sudo apt-get autoremovernsudo apt-get autoclean

1. Finally, reboot the system:

sudo reboot

Note: It's always a good idea to backup important data before upgrading a system, in case anything goes wrong.