Cron
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<timefyi-glossary slug="cron"></timefyi-glossary>定義
5つのフィールド（分・時・日・月・曜日）で指定した時刻にコマンドを実行するUnix/Linuxのジョブスケジューラ。例：'0 9 * * 1'は毎週月曜日9時に実行。