monitoring.sh

crontab

min (0-59) hour (0-23) day-of-month (1-31) day-of-week (0-6, Sunday=0) command

Run script every minute

* * * * /home/user1/monitoring.sh

monitoring.sh

touch monitoring.sh
chmod u+x monitoring.sh

#!/usr/bin/bash
SCRIPT_DIR=/tmp
ps -ef >> ${SCRIPT_DIR}/monitoring.log
cat ${SCRIPT_DIR}/monitoring.log | sort | uniq > ${SCRIPT_DIR}/monitoring.tmp
cat ${SCRIPT_DIR}/monitoring.tmp > ${SCRIPT_DIR}/monitoring.log