at

Executes commands at a specified time.

Open an at prompt to create a new set of scheduled commands, press Ctrl + D to save and exit:

at {{hh:mm:ss}}

Execute the commands and email the result using a local mailing program such as sendmail:

at {{hh:mm:ss}} -m

Execute a script at the given time:

at {{hh:mm:ss}} -f {{path/to/file}}