This works for me - I have not /etc/at.allow file and running the command from the description did something.
$ at teatime tomorrow warning: commands will be executed using /bin/sh at> <EOT> job 1 at Tue May 24 16:00:00 2016
This works for me - I have not /etc/at.allow file and running the command from the description did something.
$ at teatime tomorrow
warning: commands will be executed using /bin/sh
at> <EOT>
job 1 at Tue May 24 16:00:00 2016