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cron

Use this skill to schedule recurring or one-time commands through the system crontab and `at`. It shows how to list, add, and remove jobs, with common schedules and practical notes about command paths and output logs.

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Schedule reminders, recurring tasks, and one-time jobs using system crontab.

HKUDS/AutoSwarm星标 2,025(GitHub 2,025 + cccskills 0)

实测评分 未实测

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适用场景

  • Setting a recurring break reminder
  • Scheduling a one-time meeting reminder
  • Listing or removing scheduled jobs

包含的文件(1)

  • SKILL.md1.3 KB

SKILL.md(原文)

安装前可以查看交给 AI 代理的指令内容。

Cron

Schedule tasks using the system crontab via shell_exec.

List current cron jobs

crontab -l

Add a recurring job

(crontab -l 2>/dev/null; echo "*/20 * * * * echo 'Time to take a break!' >> /tmp/opc-reminders.log") | crontab -

Common schedules

ScheduleCron expression
Every 20 minutes*/20 * * * *
Every hour0 * * * *
Every day at 8am0 8 * * *
Weekdays at 5pm0 17 * * 1-5
Every Monday at 9am0 9 * * 1

One-time scheduled task

Use at for one-time jobs:

echo "echo 'Meeting reminder' >> /tmp/opc-reminders.log" | at 14:30

Or schedule with a specific date:

echo "echo 'Deadline reminder' >> /tmp/opc-reminders.log" | at 10:00 2026-03-20

Remove a job

Edit the crontab directly:

crontab -e

Or filter out a specific job:

crontab -l | grep -v 'pattern-to-remove' | crontab -

Notes

  • Use full paths in cron commands (cron has a minimal $PATH).
  • Redirect output to a log file or /dev/null to avoid mail noise.
  • Check at availability: which at (install with apt install at if missing).

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