Wait some specified time while displaying the remaining time
*countdown* waits for a certain time to pass, in a similar fashion to the
UNIX sleep command, but unlike sleep, it displays the amount of time left
to sleep. I always found it frustrating that I've placed an alarm using
'sleep $secs ; finish-client' and could not tell how much time left, so I
wrote *countdown* for that.
There is no official package available for openSUSE Leap 15.5