Top Command Output is Empty when run from cron

Question

I was trying to redirect the TOP command output in the particular file in every 5 minutes with the below command.

top -b -n 1 > /var/tmp/TOP_USAGE.csv.$(date          


        

Answer 1

I met the same problem as you.

Top command with -b option must be added.Saving top output to variable before we use it.

the scripts are below

date >> /tmp/mysql-mem-moniter.log

MEM=/usr/bin/top -b -n 1 -u mysql

echo "$MEM" | grep mysql >> /tmp/mysql-mem-moniter.log