Bash Scanner is a fast and reliable way to scan your server for outdated software and potential exploits.
After an initial scan, you will be asked to create an account on the PatrolServer dashboard (which is totally optional, you are free to use the tool without an account). The benefit of creating a sustainable account is detailed reporting, together with documentation on how to secure your server.
The script will ask you if it should set a cronjob, this simply means your server software will be in sync for daily scans. And you will be reported by email when your current software becomes outdated.