crypttab precheck & tmp options not working on 16.04

[Adam Funk]

On 2016-05-09, Tom H wrote:

> From https://github.com/systemd/systemd/blob/master/src/cryptsetup/cryptsetup.c#L60
>:
>
> /* Options Debian's crypttab knows we don't:
>     precheck=
>     check=
>     checkargs=
>     noearly=
>     loud=
>     keyscript=
> */
>
> 'man crypttab' is probably the man page provided by Ubuntu's cryptsetup package.
>
> The systemd crypttab man page is:
>
> https://www.freedesktop.org/software/systemd/man/crypttab.html

I was guessing this was another thing for people to grumble about in
systemd, but I got it working with this line in '/etc/crypttab':

etmp  /dev/disk/by-id/blah-blah-part6  /dev/urandom  tmp

and 'mount' shows it's an ext4 mount.

Thanks.