Final answer:
Chef agents are installed from the workstation using the Chef Development Kit (ChefDK), specifically utilizing the 'knife' command-line utility included in the package.
Step-by-step explanation:
The chef agents can be installed from the workstation using the Chef Development Kit (ChefDK), a package that provides the chef command-line utility and its associated tools. To install a chef agent, also known as a client, you would generally use the knife command which is part of the ChefDK. The knife bootstrap command is commonly used to install the chef client on a node, configure the required chef settings, and start the chef-client service on that node. This step is crucial to registering the node with your Chef Server and allowing it to manage the node's configurations.