Compare cron and anacron in Linux with an example?
| S.no | CRON | ANACRON |
|---|---|---|
| 1. | It is a daemon that runs scheduled tasks | It runs commands periodically, the frequency being defined in several days. |
| 2. | Example – updates, system backups | Example – a backup script that is scheduled to run weekly or monthly. |
| 3. | Suitable for machines that are on 24x7 like servers | Suitable for machines like laptops and desktops that are NOT on 24x7. |
| 4. | Runs as per defined schedules. | Checks if any job has to be executed when the user turns on the power. |
| 5. | Default system crontab file is /etc/crontab | Listed in /etc/anacrontab |
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