a simple case on `at'

this case makes a script and fires running it with `at' at some time. the output is redirected to a local file, instead of the default at log. the script atsay:

#!/bin/bash

exec &> ./atsay.log

echo "at is saying hello world."

fire it at some time:

$ at 15:12 -f atsay

one  may check the queued jobs with `atq' and remove jobs with `atrm'.