Amazon Linux contains an /and many others/method-launch file that specifies The existing release that may be installed. This file is updated using yum and is an element of the technique-release RPM Package Supervisor (RPM). I am not a admirer of robot definitions like Wikipedia; rather, I favor straightforward explanations. Thus… https://social-medialink.com/story2210349/dovecot-install-no-further-a-mystery