Problem "$value=`mpstat 1 1 | grep "Average"`;" Alias pipe return nothing
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, then it works fine, it return 0,99 . Fine for now, now, when I execute script ./graph.sh , it correctly write into mysql value 0,99. So now time to automatize, when i put it into cron (bcron), when it run script, it instead of "0,99" just "" , i have no idea where should be problem.
mysql needs to be treated in the same way as mpstat etc. or you could simply change it to (I'm guessing the location of mysql so please check it using type mysql at a command prompt)
/usr/bin/mysql -u graph -p123 -D graph -e "INSERT INTO cpu (time, date, value) VALUES ('$time', '$date', '$value');"
When the job is run by cron, there is no terminal to send stdout to so it will bork on the echo commands unless you redirect the entire script output to a file in the crontab or explicitly in the script itself with something like