mnt-zeno.mount
foi criado por systemd-fstab-generator
. De acordo com a explicação de Jonathan de Boyne Pollard na lista de discussão debian-user :
[systemd-fstab-generator is] a program that reads /etc/fstab at boot time and generates units that translate fstab records to the systemd way of doing things [.....]
The systemd way of doing things is mount and device units, per the systemd.mount(5) and systemd.device(5) manual pages. In the raw systemd way of doing things, there's a device unit named "dev-sde1.device" which is a base requirement for a mount unit named "media-lumix\x2dphotos.mount".
Depois de alterar fstab
deve-se quer executar systemctl daemon-reload
(isso torna systemd
a reanálise /etc/fstab
e pegar as mudanças) ou reinicialização.