To verify that you have created an at job, use the atq command. The atq command confirms that at jobs that belong to jones have been submitted to the queue.
$ atq Rank Execution Date Owner Job Queue Job Name 1st Jul 12, 2001 19:30 jones 897355800.a a stdin 2nd Jul 14, 2001 23:45 jones 897543900.a a stdin 3rd Jul 17, 2001 04:00 jones 897732000.a a stdin |