I am currently writing a bash script to output the statistics of vmstat, iostat and other commands. The script allows the user to type in how long they wish to run it for and how many repetitions.

I have been running stress on Ubuntu with stress -c 2 -t 40s for example and it stresses for 40 seconds. I would like however to run stress in bash and for the user to select how long they want to run stress for and for the system to read this and then exit afterwards.

Does anyone know how to do this? Thanks.

Well, show us your code!

This is part of the code for vmstat/iostat one, which works properly and responds to the user input and then returns to the main menu ok. I would prefer to have the stress input in a different script but what is the syntax for the user to choose how long to run stress for? If I have used vmstat $INT even on its own, the script just freezes.


#!/bin/bash
#
# Script to output system statistics
echo "Enter the number of intervals (seconds) for the sar statistics:"
read int
echo "enter the number of output lines (count) to process:"
read cnt
clear
#set while

while true; do
clear
echo "*******************************"
echo "* Please choose an option *"
echo "*******************************"
echo "* [1] To view process creation statistics *"
echo "* [2] To view I/O and transfer rate statistics *"
echo "* [3] To view paging statistics *"
echo "Press A to quit."
echo "************************"
echo -n "Enter your menu choice [1-3]: "
D=`/bin/date '+%B.%d'`
INT=$int
CNT=$cnt
#Variable to read input from the keyboard.
read mychoice
case $mychoice in
1) echo "process creation statistics";
vmstat $INT $CNT |tee /tmp/sar_proc_stat_$D
echo "This file will be saved to /tmp/sar_pc_stat_$D"
sleep 3 ;;

I am not sure I understand the issue? Can you not use your variables with the switches to the command?

Also, please use [code][/code] tags around code and data to make it easier to read