qdated-makekey creates the file ~/.qdated-key, which
qdated-now and qdated-check
use to create and verify the timestamp hash.
Interface
qdated-makekey
You need to run qdated-makekey only once. If it's successful in creating
~/.qdated-key, it exits silently. If there's a problem (for example, if
~/.qdated-key already exists), it'll complain and exit.