buildah-umount - Unmount the root file system on the specified working containers.
buildah umount [options] [container ...]
Unmounts the root file system on the specified working containers.
--all, -a
All of the currently mounted containers will be unmounted.
buildah umount containerID
buildah umount containerID1 containerID2 containerID3
buildah umount --all
buildah(1), buildah-umount(1)