Debian has released a stable version of Debian 6.0 (Squeeze).
If you’re running previous version of Debian, you can easily upgrade.
1. Update all packages currently installed to the latest lenny versions
2. Replace all occurrences of etch with Squeeze in the apt sources file (pico /etc/apt/sources.list).
Here’s an example of what the file could look like after the change:
deb http://ftp.ro.debian.org/debian/ squeeze main
deb-src http://ftp.ro.debian.org/debian/ squeeze main
deb http://security.debian.org/ squeeze/updates main
deb-src http://security.debian.org/ squeeze/updates main
deb http://ftp.ro.debian.org/debian/ squeeze-updates main
deb-src http://ftp.ro.debian.org/debian/ squeeze-updates main
3. Update apt repository
4. Upgrade apt, dpkg and aptitude packages first
apt-get install apt dpkg aptitude
5. Do a dist-upgrade to upgrade the rest of the system
7. Check the debian version
It should read version 6.0.