$ curl cheat.sh/
 cheat:at 
# To schedule a one time task:
at <time>
<command 0>...
Ctrl-d

# <time> can be either
now | midnight | noon | teatime (4pm)
HH:MM
now + N <minutes | hours | days | weeks>
MM/DD/YY

# To list pending jobs:
atq

# To remove a job (use id from atq):
atrm <id>

 tldr:at 
# at
# Execute commands once at a later time.
# Service atd (or atrun) should be running for the actual executions.
# More information: <https://manned.org/at>.

# Execute commands from standard input in 5 minutes (press `Ctrl + D` when done):
at now + 5 minutes

# Execute a command from standard input at 10:00 AM today:
echo "./make_db_backup.sh" | at 1000

# Execute commands from a given file next Tuesday:
at -f path/to/file 9:30 PM Tue

$
Follow @igor_chubin cheat.sh