The Snyk CLI is an excellent tool for scanning applications, containers, and infrastructure as code for security vulnerabilities. It offers powerful features such as auto-detection of manifest files, testing of local dependencies, and remediation actions. The CLI can be installed using various methods, including npm, Homebrew, Scoop, or by downloading a binary from GitHub. Authentication is required to use the CLI, which can be done through API tokens, environment variables, or signing up for an account. The CLI provides various commands such as `snyk test` and `snyk monitor`, which scan projects for vulnerabilities and create snapshots of the project, respectively. These snapshots are then monitored over time to detect any new vulnerabilities or remediation paths. Additionally, the CLI offers features like `snyk ignore`, which allows users to ignore specific vulnerabilities, and `snyk container`, which scans Docker images for security vulnerabilities. The CLI also supports Infrastructure as Code (IaC) scanning, which enables developers to find and fix misconfigurations that can lead to security problems. With the Snyk CLI, users can get started with capture the flag challenges by watching a virtual 101 workshop on demand.