OpenNebula

Commands use very different naming one from another, for example the snapshot commands are:

   * snapshot-create <range|vmid_list> [<name>]
        Creates a new VM snapshot
        valid options: schedule

   * snapshot-revert <vmid> <snapshot_id>
        Reverts a VM to a saved snapshot

   * snapshot-delete <vmid> <snapshot_id>
        Delets a snapshot of a VM

but attach/detach objects are:

   * attachdisk <vmid>
        Attaches a disk to a running VM

        States: RUNNING
        valid options: file, image, target, cache

   * detachdisk <vmid> <diskid>
        Detaches a disk from a running VM

        States: RUNNING

   * attachnic <vmid>
        Attaches a NIC to a running VM

        States: RUNNING
        valid options: file, network, ip

   * detachnic <vmid> <nicid>
        Detaches a NIC from a running VM

        States: RUNNING