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3.1. Package Tasks
During the Server Edition installation you have the option of installing additional packages. The packages are grouped by the type of service they provide.
• DNS server: Selects the BIND DNS server and its documentation.
• LAMP server: Selects a ready-made Linux/Apache/MySQL/PHP server.
• Mail server: This task selects a variety of packages useful for a general purpose mail server system.
• OpenSSH server: Selects packages needed for an OpenSSH server.
• PostgreSQL database: This task selects client and server packages for the PostgreSQL database.
• Print server: This task sets up your system to be a print server.
• Samba File server: This task sets up your system to be a Samba file server, which is especially suitable in networks with both Windows and Linux systems.
• Tomcat Java server: Installs Apache Tomcat and needed dependencies.
• Virtual Machine host: Includes packages needed to run KVM virtual machines.
• Manually select packages: Executes aptitude allowing you to individually select packages.
Installing the package groups is accomplished using the tasksel utility. One of the important differences 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 a fully integrated service.
Once the installation process has finished you can view a list of available tasks by entering the following from a terminal prompt:
tasksel --list-tasks
9 https://help.ubuntu.com/18.04/installation-guide/
The output will list tasks from other Ubuntu based distributions such as Kubuntu and Edubuntu. Note that you can also invoke the tasksel command by itself, which will bring up a menu of the different tasks available.
You can view a list of which packages are installed with each task using the --task-packages option. For example, to list the packages installed with the DNS Server task enter the following:
tasksel --task-packages dns-server
The output of the command should list:
bind9-doc bind9utils bind9
If you did not install one of the tasks during the installation process, but for example you decide to make your new LAMP server a DNS server as well, simply insert the installation media and from a terminal:
sudo tasksel install dns-server