i will apologize in advance if this comes across as marketing, since i legitimately want this group's opinion on whether i'm taking the wrong approach in designing a course on container technology. lately, since i live on fedora linux, i've been messing with their container management commands "podman" and "buildah" for, respectively, running and building container images. there is a powerful equivalence between these two tools and the corresponding docker commands: podman == docker buildah == docker build in fact, the correspondence is so perfect that many people simply install both and: $ alias docker=podman you can see the equivalence here: https://github.com/containers/libpod/blob/master/transfer.md https://developers.redhat.com/blog/2019/02/21/podman-and-buildah-for-docker-users/ and here's my problem. i prefer the podman and buildah tools -- they have some features that docker lacks but, other than that, they are literally drop-in replacements. so one can teach a container course just as appropriately using these tools (podman, buildah, skopeo) as using docker. but will people understand that? all of the folks i've talked to insist that, when clients call up looking for container training, they almost always ask, "do you teach docker?", not realizing there are more container solutions than just that. so even if the technology i'm presenting will work just as well (same underlying container runtime engines and so on), will potential clients simply say, "sorry, we're looking for docker training, thanks." open to thoughts. from the perspective of marketing, it does no good to say, "my stuff is just as good if not better" if the client says, "sorry, we want docker." rday p.s. in exchange for opinions, i'm currently writing up all sorts of container stuff here: http://crashcourse.ca/dokuwiki/doku.php?id=containers_on_fedora_30 related to containers specifically on (upcoming) fedora 30 if people want to read it. it's all publicly available, so help yourself. To unsubscribe send a blank message to linux+unsubscribe [ at ] linux-ottawa [ dot ] org To get help send a blank message to linux+help [ at ] linux-ottawa [ dot ] org To visit the archives: https://lists.linux-ottawa.org