# Send Cron Scheduler to your agent Hand the extracted package to your coding agent with a concrete install brief instead of figuring it out manually. ## Fast path - Download the package from Yavira. - Extract it into a folder your agent can access. - Paste one of the prompts below and point your agent at the extracted folder. ## Suggested prompts ### New install ```text I downloaded a skill package from Yavira. Read SKILL.md from the extracted folder and install it by following the included instructions. Tell me what you changed and call out any manual steps you could not complete. ``` ### Upgrade existing ```text I downloaded an updated skill package from Yavira. Read SKILL.md from the extracted folder, compare it with my current installation, and upgrade it while preserving any custom configuration unless the package docs explicitly say otherwise. Summarize what changed and any follow-up checks I should run. ``` ## Machine-readable fields ```json { "schemaVersion": "1.0", "item": { "slug": "cron-scheduler", "name": "Cron Scheduler", "source": "tencent", "type": "skill", "category": "开发工具", "sourceUrl": "https://clawhub.ai/picaye/cron-scheduler", "canonicalUrl": "https://clawhub.ai/picaye/cron-scheduler", "targetPlatform": "OpenClaw" }, "install": { "downloadUrl": "/downloads/cron-scheduler", "sourceDownloadUrl": "https://wry-manatee-359.convex.site/api/v1/download?slug=cron-scheduler", "sourcePlatform": "tencent", "targetPlatform": "OpenClaw", "packageFormat": "ZIP package", "primaryDoc": "SKILL.md", "includedAssets": [ "SKILL.md" ], "downloadMode": "redirect", "sourceHealth": { "source": "tencent", "slug": "cron-scheduler", "status": "healthy", "reason": "direct_download_ok", "recommendedAction": "download", "checkedAt": "2026-05-02T06:01:13.808Z", "expiresAt": "2026-05-09T06:01:13.808Z", "httpStatus": 200, "finalUrl": "https://wry-manatee-359.convex.site/api/v1/download?slug=cron-scheduler", "contentType": "application/zip", "probeMethod": "head", "details": { "probeUrl": "https://wry-manatee-359.convex.site/api/v1/download?slug=cron-scheduler", "contentDisposition": "attachment; filename=\"cron-scheduler-1.0.0.zip\"", "redirectLocation": null, "bodySnippet": null, "slug": "cron-scheduler" }, "scope": "item", "summary": "Item download looks usable.", "detail": "Yavira can redirect you to the upstream package for this item.", "primaryActionLabel": "Download for OpenClaw", "primaryActionHref": "/downloads/cron-scheduler" }, "validation": { "installChecklist": [ "Use the Yavira download entry.", "Review SKILL.md after the package is downloaded.", "Confirm the extracted package contains the expected setup assets." ], "postInstallChecks": [ "Confirm the extracted package includes the expected docs or setup files.", "Validate the skill or prompts are available in your target agent workspace.", "Capture any manual follow-up steps the agent could not complete." ] } }, "links": { "detailUrl": "https://openagent3.xyz/skills/cron-scheduler", "downloadUrl": "https://openagent3.xyz/downloads/cron-scheduler", "agentUrl": "https://openagent3.xyz/skills/cron-scheduler/agent", "manifestUrl": "https://openagent3.xyz/skills/cron-scheduler/agent.json", "briefUrl": "https://openagent3.xyz/skills/cron-scheduler/agent.md" } } ``` ## Documentation ### Cron Scheduler Manage scheduled tasks and automation on your system using cron. Category: automation, productivity API Key Required: No ### What It Does Create, manage, and monitor scheduled tasks (cron jobs) on your machine. Automate backups, health checks, cleanup scripts, API calls, notifications — anything that should run on a schedule. Your agent handles the cron syntax so you don't have to. ### List all cron jobs echo "=== User crontab ===" crontab -l 2>/dev/null || echo "(empty)" echo "" echo "=== System cron ===" ls /etc/cron.d/ 2>/dev/null echo "" echo "=== Cron directories ===" echo "Hourly: $(ls /etc/cron.hourly/ 2>/dev/null | wc -l) jobs" echo "Daily: $(ls /etc/cron.daily/ 2>/dev/null | wc -l) jobs" echo "Weekly: $(ls /etc/cron.weekly/ 2>/dev/null | wc -l) jobs" echo "Monthly: $(ls /etc/cron.monthly/ 2>/dev/null | wc -l) jobs" ### Add a cron job # Add to user crontab (crontab -l 2>/dev/null; echo "SCHEDULE COMMAND") | crontab - # Common schedules: # Every minute: * * * * * # Every 5 minutes: */5 * * * * # Every hour: 0 * * * * # Every day at 2am: 0 2 * * * # Every Monday 9am: 0 9 * * 1 # Every 1st of month: 0 0 1 * * # Weekdays at 8am: 0 8 * * 1-5 ### Remove a cron job # Edit crontab interactively crontab -e # Or remove a specific line crontab -l | grep -v "PATTERN_TO_REMOVE" | crontab - ### Check cron logs # Recent cron activity grep CRON /var/log/syslog | tail -20 # Or on systems using journald journalctl -u cron --since "1 hour ago" --no-pager | tail -20 ### Test a cron command # Run the command manually first to make sure it works COMMAND_HERE # Check it produces expected output echo "Exit code: $?" ### Cron syntax reference ┌───────────── minute (0-59) │ ┌───────────── hour (0-23) │ │ ┌───────────── day of month (1-31) │ │ │ ┌───────────── month (1-12) │ │ │ │ ┌───────────── day of week (0-7, 0 and 7 = Sunday) │ │ │ │ │ * * * * * command ### Common patterns # Disk space alert daily at 8am 0 8 * * * df -h / | awk 'NR==2 && $5+0 > 80 {print "Disk alert: " $5 " used"}' | mail -s "Disk Warning" you@email.com # Clean /tmp weekly 0 3 * * 0 find /tmp -type f -mtime +7 -delete # Backup database nightly 0 2 * * * pg_dump mydb > /backups/db_$(date +\\%Y\\%m\\%d).sql # Restart a service if it crashes (every 5 min check) */5 * * * * systemctl is-active myservice || systemctl restart myservice # Log system stats every 15 minutes */15 * * * * echo "$(date): $(uptime)" >> /var/log/system-stats.log ### Environment variables in cron # Cron runs with minimal environment. Set what you need: (crontab -l 2>/dev/null; echo "PATH=/usr/local/bin:/usr/bin:/bin SHELL=/bin/bash 0 2 * * * /home/user/backup.sh >> /var/log/backup.log 2>&1") | crontab - ### Redirect output (important!) # Log output * * * * * command >> /var/log/myjob.log 2>&1 # Discard output * * * * * command > /dev/null 2>&1 # Email output (if mail is configured) MAILTO=you@email.com 0 8 * * * command ### Examples User: "Run my backup script every night at 2am" → (crontab -l 2>/dev/null; echo "0 2 * * * /home/user/backup.sh >> /var/log/backup.log 2>&1") | crontab - User: "Check disk space every hour and alert me if it's over 80%" → Create a check script + cron job User: "What scheduled tasks are running?" → List all crontabs and system cron directories User: "Stop the daily cleanup job" → Find and remove the specific cron entry ### Constraints Cron runs with minimal PATH — use absolute paths for commands Always redirect output (>> logfile 2>&1) or cron fills up mail spool Cron uses the system timezone — check with timedatectl Minimum resolution is 1 minute — for sub-minute, use a loop in a script User crontabs don't survive user deletion Test commands manually before scheduling ## Trust - Source: tencent - Verification: Indexed source record - Publisher: picaye - Version: 1.0.0 ## Source health - Status: healthy - Item download looks usable. - Yavira can redirect you to the upstream package for this item. - Health scope: item - Reason: direct_download_ok - Checked at: 2026-05-02T06:01:13.808Z - Expires at: 2026-05-09T06:01:13.808Z - Recommended action: Download for OpenClaw ## Links - [Detail page](https://openagent3.xyz/skills/cron-scheduler) - [Send to Agent page](https://openagent3.xyz/skills/cron-scheduler/agent) - [JSON manifest](https://openagent3.xyz/skills/cron-scheduler/agent.json) - [Markdown brief](https://openagent3.xyz/skills/cron-scheduler/agent.md) - [Download page](https://openagent3.xyz/downloads/cron-scheduler)