Execute commands once at a later time. Results will be sent to the users mail. More information: https://manned.org/at.
atd
daemon:systemctl start atd
<Ctrl> + D
when done):at now + 5 minutes
at hh:mm
stdin
at 10:00 AM today:echo "command" | at 1000
at -f path/to/file 9:30 PM Tue