The recommended way to upgrade a Server Edition installation is to use the do-release-upgrade utility. Part of the update-manager-core package, it does not have any graphical dependencies and is installed by default.Debian based systems can also be upgraded by using apt-get dist-upgrade. However, using Installing the package groups is accomplished using the tasksel utility. One of the important difference between Ubuntu (or Debian) and other GNU/Linux distribution is that, when installed, a package is also configured to reasonable defaults, eventually prompting you for additional required information. Likewise, when installing a task, the packages are not only installed, but also configured to provided
Once the installation process has finished you can view a list of available tasks by entering the following from a
You can view a list of which packages are installed with each task using the --task-packages option.
tasksel --task-packages dns-server