tang / clevis: automatic unlocking for luks device not triggered unless defined as _netdev I've setup a server with luks devices (not used for root partition), they are listed in `/etc/crypttab` this way # <target name> <source device> <key file> <options> luks_device_1 /dev/mapper/vg-lv_1 none luks ... I've also setup a `tang` server and bound the devices to tang using the command clevis luks bind -d /dev/mapper/vg-lv_1 tang '{"url":" finally I enable the units `clevis-luks-askpass.path` and `clevis-luks-askpass.service` to have the automatic unlocking mechanism working at boot. However the devices are not unlocked at boot, the password is asked on the console, **unless** I add in the file `/etc/crypttab` the string `_netdev` in the `options` section. But I'm not really fond of that because `_netdev` is supposed to be used for network devices. Did I miss something ?

Actually, according the manpage `clevis-luks-unlockers(7)` having the option `_netdev` in `/etc/crypttab` is necessary to trigger the automatic unlocking.

> After a reboot, Clevis will attempt to unlock all _netdev devices listed in /etc/crypttab when systemd prompts for their passwords. This implies that systemd support for _netdev is required.