Quoting Arnt Karlsen (arnt@???):

> ..my /etc/cron.d/machine-id:
> PATH=/bin:/usr/bin:/sbin:/usr/sbin
>
> # ..a new /etc/machine-id every minute... ;o)
> * * * * * root date |md5sum |cut -d" " -f-1 >/etc/machine-id |tee
> >/dev/null 2>&1

_Very_ nice solution. I think I'll steal it whenever I finally need
/etc/machine-id .