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at — a one-time scheduled job

cheat sheet · Linux · at https://lab.dimsanych.ru/en/wiki/at/

Cheat sheet

echo "command" | at 03:00 once at 3:00
at now + 30 minutes in 30 minutes
at -f script.sh 02:00 a script file
atq show the job queue
at -c 5 show the contents of job #5
atrm 5 remove job #5
output goes by mail — redirect it yourself: "cmd > /tmp/out 2>&1"

Options

Below are the main flags of at, atq, atrm; the full list is in man at.