What is one of the tools found in the Chef library?

The Chef library includes several tools that are essential for managing configurations and automating the deployment of applications. Chef itself is a powerful configuration management tool that allows for the automation of system configuration, installation, and management of software across your infrastructure.

Knife is a command-line tool that provides an interface between a local chef repository and the Chef server. It allows users to perform various tasks such as managing nodes, creating and managing cookbooks, and searching for resources. Together, Chef and Knife facilitate the entire process of defining infrastructure as code and managing system configurations effectively.

While Jenkins, Ansible, and Puppet Bolt are also popular tools in the realm of DevOps and automation, they belong to different management ecosystems. Jenkins is mainly used for continuous integration and continuous delivery (CI/CD), Ansible is another configuration management tool similar to Chef, and Puppet Bolt is a task runner that allows users to execute ad-hoc tasks across their infrastructure. These tools do not directly belong to the Chef library, making Chef and Knife the correct answer in this context.