Vuls is a vulnerability scanner designed for Linux, FreeBSD, Windows, and macOS, built in Go and operates without needing an agent. System administrators often face challenges in keeping their software updated manually, particularly to avoid downtime in production environments. Vuls addresses this by automating vulnerability detection and reporting, which helps administrators stay informed about potential risks without constant monitoring of databases like the National Vulnerability Database (NVD). The tool supports a wide array of operating systems, including major Linux distributions such as CentOS, Ubuntu, and Fedora, as well as FreeBSD and macOS. It can work in various environments, including cloud and on-premises setups. Vuls can scan without root privileges and has options for offline scanning, making it versatile for different server configurations. The scanning process generates regular reports and can notify users via email or Slack, including support for the Japanese language. Vuls integrates with services like GitHub and uses different methods for vulnerability detection, such as lockfile-based scans and OWASP Dependency Checks. It allows for continuous integration, enabling daily tests to quickly identify vulnerabilities. Users can set up a single Vuls server to manage multiple target servers via SSH or run scans locally without needing SSH connections. The results are presented in JSON format, making them easy to process or display through various interfaces.