CronJob

A comprehensive sysops toolkit for scanning, monitoring, reporting, and maintaining scheduled job operations. CronJob provides 18+ commands for tracking job events, performing health checks, managing backups, benchmarking performance, and exporting operational data in multiple formats.

Commands

Each data command (scan, monitor, report, etc.) works in two modes:

• With arguments: Records the input with a timestamp into its dedicated log file
• Without arguments: Displays the 20 most recent entries from that category

Data Storage

All data is stored locally in plain-text log files:

• Location: ~/.local/share/cronjob/
• Format: Each entry is saved as YYYY-MM-DD HH:MM|\x3Cvalue> in per-category .log files
• History: All operations are additionally logged to history.log with timestamps
• Export: The export command can generate JSON, CSV, or TXT files from all log data
• No cloud sync — everything stays on your machine

Requirements

• Bash 4.0+ (uses set -euo pipefail)
• Standard Unix utilities: date, wc, du, head, tail, grep, basename, cat
• No external dependencies, no API keys, no network access required
• Works on Linux and macOS

When to Use

1. Cron job monitoring — Track the execution status of scheduled jobs, log failures, and set up alerts for review
2. Job audit trail — Record scan, check, and report entries to maintain a complete history of job operations
3. Backup & restore logging — Log backup and restore events with timestamps so you always know what happened and when
4. Performance benchmarking — Record benchmark results for scheduled tasks and compare them over time to spot regressions
5. Operational data export — Export all collected logs in JSON, CSV, or TXT format for dashboards, compliance, or further analysis

Examples

# Record a scan of cron job health
cronjob scan "all 12 scheduled jobs ran successfully today"

# Log a monitoring observation
cronjob monitor "backup-job took 45min, 3x longer than usual"

# Record an alert for a failed job
cronjob alert "daily-report cron failed at 03:00 — exit code 1"

# Log a fix action taken
cronjob fix "increased timeout for backup-job from 30m to 90m"

# View summary statistics across all categories
cronjob stats

# Export all data to CSV for spreadsheet analysis
cronjob export csv

# Search for entries related to a specific job
cronjob search "backup-job"

# Quick health check
cronjob status

# View the 20 most recent activity entries
cronjob recent

Configuration

Set CRONJOB_DIR to change the data directory. Default: ~/.local/share/cronjob/

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