~/devtools / cron / every-minute
tool::cron-guide

cron every-minute

* * * * *

Every Minute

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Field Breakdown
*
Minute (0–59)
any
*
Hour (0–23)
any
*
Day of Month (1–31)
any
*
Month (1–12)
any
*
Day of Week (0–6)
any
0–59
0–23
1–31
1–12
0–6 (Sun–Sat)

The shortest possible cron interval — runs every minute at second 0. All five fields are wildcards (*), meaning it matches any minute of any hour of any day. Use with caution: it generates 1,440 executions per day and can overwhelm servers if the job is slow.

Next 5 Executions (Example)
UTC example times after 2026-01-01
#1Thu, Jan 1, 2026, 12:00 AM UTC
#2Thu, Jan 1, 2026, 12:01 AM UTC
#3Thu, Jan 1, 2026, 12:02 AM UTC
#4Thu, Jan 1, 2026, 12:03 AM UTC
#5Thu, Jan 1, 2026, 12:04 AM UTC

Platform Usage

Linux Crontab— Run crontab -e and add the line
# crontab -e
* * * * * /path/to/script.sh
# With logging:
* * * * * /path/to/script.sh >> /var/log/myjob.log 2>&1
Kubernetes CronJob— Set in spec.schedule field
apiVersion: batch/v1
kind: CronJob
metadata:
  name: my-cronjob
spec:
  schedule: "* * * * *"
  jobTemplate:
    spec:
      template:
        spec:
          containers:
          - name: my-job
            image: my-image:latest
          restartPolicy: OnFailure
GitHub Actions— Add to on.schedule trigger
on:
  schedule:
    - cron: '* * * * *'

jobs:
  my-job:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - run: ./my-script.sh

Common Use Cases

  • ▸Real-time monitoring and health checks
  • ▸Processing pending message queues
  • ▸Collecting IoT sensor data
  • ▸Per-minute cache refresh
  • ▸Polling service endpoints

Related Presets

*/5 * * * *every 5 minutes→*/10 * * * *every 10 minutes→*/15 * * * *every 15 minutes→*/30 * * * *every 30 minutes→
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