$ cat t.sh
#!/bin/bash

echo ScriptName is \>\>$0\<\< |wall

$ at -f t.sh now +1 MINUTE
warning: commands will be executed using /bin/sh
job 1 at Wed Dec 17 21:41:00 2014

Широковещательное сообщение от freeowl@freeowl-pc
        (somewhere) at 21:41 ...

ScriptName is >>sh<<