`at`

Check if `atd` is running

systemctl status atd.service

Run command at specified time

at <time spec>
<command>
[...]
<Ctrl + D>

at <time spec> <<END
<command>
[...]
END

echo "<command>" | at <time spec>

	Description
`<time spec>`	`{ NOW \| <time> \| <date> \| <time> <date> } [{+\|-} <period> <unit>]`
`<time>`	`{ <HH>:<MM> [AM\|PM] } [UTC]`
`<date>`	`<month name> <day> [<year>] \| MM/DD/[YY]YY \| [YY]YY-MM-DD \| [NEXT] <day of week> \| TODAY \| TOMORROW`
`<month name>`	`JAN` \| `FEB` \| `MAR` \| `APR` \| `MAY` \| `JUN` \| `JUL` \| `AUG` \| `SEP` \| `OCT` \| `NOV` \| `DEC`
`<day of week>`	`SUN` \| `MON` \| `TUE` \| `WED` \| `THU` \| `FRI` \| `SAT`
`<unit>`	`MINUTE` \| `HOUR` \| `DAY` \| `WEEK` \| `MONTH` \| `YEAR`

atrm <job ID>

at {-r|-d} <job ID>

atq

at -l

at -c <job ID>