dumb-init is a lightweight process supervisor and minimal init system designed to run as the primary process in a Linux container. It functions as a manager for the first process in a namespace, specifically handling the responsibilities of a Linux init system.
The project focuses on signal proxying and the reclamation of zombie processes. It captures incoming system signals and relays or translates them to child process groups to ensure graceful application shutdown and termination.
It manages the lifecycle of spawned applications by monitoring child processes and collecting terminated ones to prevent the system process table from filling up.