Before using the "dnf group install" command to install a package group, you will typically want to use the dnf group list command to list the installed and available package groups.

dnf group list

Let's say the dnf group list --verbose command returns the following. Since the --verbose flag was used, both the group name and group ID (in parathensis) is listed.

Available Groups:
   3D Printing (3d-printing)
   Administration Tools (admin-tools)
   Audio Production (audio)
   Authoring and Publishing (authoring-and-publishing)
   C Development Tools and Libraries (c-development)
   Cloud Infrastructure (cloud-infrastructure)
   Cloud Management Tools (cloud-management)
   Compiz (compiz)
   Container Management (container-management)
   D Development Tools and Libraries (d-development)
   Design Suite (design-suite)
   Development Tools (development-tools)
   Domain Membership (domain-client)
   Fedora Eclipse (eclipse)

The dnf group install command can be used to install a package group. In this example, the Fedora Eclipse package group will be installed.

dnf group install "Fedora Eclipse"

Or, you could use the group ID.

dnf group install eclipse

Or you could use the dnf install command with the @ character followed by the group id.

dnf install @eclipse