distrobox-upgrade
distrobox-upgrade will enter the specified list of containers and will perform an upgrade using the container's package manager.
distrobox upgrade
--help/-h: show this message
--all/-a: perform for all distroboxes
--verbose/-v: show more verbosity
--version/-V: show version
distrobox-upgrade --all
distrobox-upgrade alpine-linux ubuntu22 my-distrobox123
distrobox upgrade CONTAINER_NAME [CONTAINER_NAME1 CONTAINER_NAME2 ...]