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BytesAgain β€Ί Skills β€Ί Cron Scheduler
πŸ¦€ ClawHub

Cron Scheduler

by @ppopen

Manage cron jobs on macOS/Linux - list, add, remove, backup, and schedule recurring tasks

Versionv1.0.0
Downloads1,452
Installs8
#legal#automation#productivity
TERMINAL
clawhub install openclaw-skill-cron-scheduler

πŸ“– About This Skill

name: cron-scheduler description: Manage cron jobs on macOS/Linux - list, add, remove, backup, and schedule recurring tasks triggers: - "cron" - "cron job" - "schedule task" - "recurring task" - "crontab" commands: list: usage: cron-scheduler list description: List all cron jobs for current user add: usage: cron-scheduler add "" "" description: Add a new cron job with schedule validation remove: usage: cron-scheduler remove description: Remove a cron job by line number remove-pattern: usage: cron-scheduler removep description: Remove cron jobs matching a pattern edit: usage: cron-scheduler edit description: Open crontab in default editor next: usage: cron-scheduler next description: Show next run times for all jobs backup: usage: cron-scheduler backup description: Backup current crontab to ~/.cron-backups/ restore: usage: cron-scheduler restore [backup_file] description: Restore crontab from backup (lists available if no file) service: usage: cron-scheduler service description: Enable/disable or check cron service status templates: usage: cron-scheduler templates description: Show common cron job schedule templates

Cron Scheduler Skill

A comprehensive skill for managing cron jobs on both macOS and Linux systems.

Features

1. List Jobs - View all cron jobs for the current user 2. Add Job - Create new cron jobs with schedule validation 3. Remove Job - Delete jobs by line number or pattern 4. Edit Crontab - Open crontab in your default editor 5. Next Runs - See when each job will execute next 6. Backup/Restore - Safely backup and restore crontab configurations 7. Service Control - Start/stop/status of cron daemon 8. Templates - Common schedule patterns for quick setup

Requirements

  • crontab command (pre-installed on macOS/Linux)
  • bash shell
  • Optional: cronnext for accurate next-run predictions (Linux)

    • Installation

    # Make the script executable
chmod +x ~/.openclaw/workspace/skills/cron-scheduler/scripts/cron-helper.sh
    Optional: Add to PATH
    
echo 'export PATH="$HOME/.openclaw/workspace/skills/cron-scheduler/scripts:$PATH"' >> ~/.zshrc
source ~/.zshrc

    Usage

    List all cron jobs

    cron-scheduler list

    or
    
cron-scheduler l

    Add a new cron job

    # Daily backup at 2am
cron-scheduler add "0 2 * * *" "~/scripts/backup.sh"
    Every hour
    
cron-scheduler add "0 * * * *" "~/scripts/hourly-task.sh"
    Every 5 minutes
    
cron-scheduler add "*/5 * * * *" "~/scripts/monitor.sh"

    Remove cron jobs

    # By line number (use 'list' first to see line numbers)
cron-scheduler remove 3
    By pattern (matches anywhere in the line)
    
cron-scheduler removep "backup"

    Edit crontab directly

    cron-scheduler edit

    or
    
cron-scheduler e

    Show next run times

    cron-scheduler next

    or
    
cron-scheduler n

    Backup and restore

    # Create backup
cron-scheduler backup
    List available backups
    
cron-scheduler restore
    Restore specific backup
    
cron-scheduler restore ~/.cron-backups/crontab_20240315_143022.bak

    Manage cron service

    # Check status
cron-scheduler service status
    Start cron (may require sudo)
    
cron-scheduler service start
    Stop cron (may require sudo)
    
cron-scheduler service stop

    View templates

    cron-scheduler templates

    or
    
cron-scheduler t

    Cron Schedule Format

    β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€ minute (0 - 59)
β”‚ β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€ hour (0 - 23)
β”‚ β”‚ β”Œβ”€β”€β”€β”€β”€β”€β”€β”€ day of month (1 - 31)
β”‚ β”‚ β”‚ β”Œ------ month (1 - 12)
β”‚ β”‚ β”‚ β”‚ β”Œ---- day of week (0 - 6, Sunday=0)
* * * * *

    Common Examples

    | Schedule | Description | |----------|-------------| | 0 0 * * * | Daily at midnight | | 0 2 * * * | Daily at 2am | | 0 * * * * | Every hour | | */5 * * * * | Every 5 minutes | | 0 9 * * 1-5 | Weekdays at 9am | | 0 0 * * 0 | Weekly on Sunday | | 0 0 1 * * | Monthly on 1st |

    Platform Support

  • macOS: Uses launchctl for service management
  • Linux: Uses systemctl for service management

    • Safety Features

  • Temporary files used for atomic crontab modifications
  • Backup created before any destructive operations
  • Confirmation prompt before restore
  • Schedule validation before adding jobs

    • πŸ’‘ Examples

    List all cron jobs

    cron-scheduler list

    or
    
cron-scheduler l

    Add a new cron job

    # Daily backup at 2am
cron-scheduler add "0 2 * * *" "~/scripts/backup.sh"
    Every hour
    
cron-scheduler add "0 * * * *" "~/scripts/hourly-task.sh"
    Every 5 minutes
    
cron-scheduler add "*/5 * * * *" "~/scripts/monitor.sh"

    Remove cron jobs

    # By line number (use 'list' first to see line numbers)
cron-scheduler remove 3
    By pattern (matches anywhere in the line)
    
cron-scheduler removep "backup"

    Edit crontab directly

    cron-scheduler edit

    or
    
cron-scheduler e

    Show next run times

    cron-scheduler next

    or
    
cron-scheduler n

    Backup and restore

    # Create backup
cron-scheduler backup
    List available backups
    
cron-scheduler restore
    Restore specific backup
    
cron-scheduler restore ~/.cron-backups/crontab_20240315_143022.bak

    Manage cron service

    # Check status
cron-scheduler service status
    Start cron (may require sudo)
    
cron-scheduler service start
    Stop cron (may require sudo)
    
cron-scheduler service stop

    View templates

    cron-scheduler templates

    or
    
cron-scheduler t