Why cron job fails to redirect top command output, to a file, using a shell script?

Solution Verified - Updated -

Issue

  • A cron job fails to redirect top command output, to a file, using a shell script.

    # cat /scripts/cpu-usage.sh
!/bin/bash
date >> /tmp/stats/cpu_stats
top |head -n 3 |tail -n 1 >> /tmp/stats/cpu_stats

# grep cpu /etc/crontab
*/5 * * * * root /scripts/cpu-usage.sh

# tail -f /tmp/stats/cpu_stats
Mon Jul 17 21:05:01 IST 2023
Mon Jul 17 21:10:01 IST 2023
Mon Jul 17 21:15:01 IST 2023

Environment

  • Red Hat Enterprise Linux 6

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