I need a KornShell script that will, among all the users currently logged on to the system, find a slot of one hour that contains the most number of users. I know how to list all the users currently logged on but how do I do anything with the times that are listed?

Have your script run in a loop and run the following -- date and 'w'.

Exit your script after you are done collecting your metrics. Write another little script to parse the output and create a pretty chart.

Here is a short script that may help.

It is very simplistic and you can concatenate the echo output to a log file if you wish.

#!/bin/ksh

eval `date '+hour=%H minute=%M second=%S'`

end_hr=`expr ${hour} + 1`

end_time="${end_hr}:${minute}:${second}"

until [ -z ${now_time} -eq ${end_time} ]

do

now_time=`date +%H:%M:%S`

numr=`who | wc -l`

echo "${numr} users are logged on at ${now_time}"

sleep 60
done

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