The Azure DevOps CLI (Command-Line Interface) is a set of command-line tools provided by Microsoft to interact with Azure DevOps Services and Azure DevOps Server (formerly known as Team Foundation Server or TFS). It allows users to automate various tasks related to managing projects, repositories, builds, releases, work items, and other aspects of the software development lifecycle.

The Azure DevOps CLI provides a way to manage Azure DevOps resources from the command line, which can be useful for automating repetitive tasks, integrating with other tools and scripts, and maintaining consistent workflows across teams.

Some common tasks that you can perform using the Azure DevOps CLI include:

1. Managing Projects: Creating, listing, updating, and deleting projects.
2. Working with Repositories: Cloning repositories, pushing code changes, and managing branches.
3. Building and Releasing: Triggering builds, creating release pipelines, and managing deployments.
4. Managing Work Items: Creating, updating, and querying work items like tasks, bugs, and user stories.
5. User and Group Management: Managing users and groups within Azure DevOps.

To use the Azure DevOps CLI, you need to install it first. As of my last update in September 2021, the CLI can be installed using Python’s pip package manager. You can install it with the following command:

After installation, you can use the az devops command to interact with Azure DevOps resources. For example, you might use commands like az devops project list to list all projects in your organization or az devops repos create to create a new Git repository.

Please note that details may have changed since my last update, and it’s a good practice to refer to the official Microsoft documentation for the most up-to-date information on installing, configuring, and using the Azure DevOps CLI.