How to store output of (mpstat) command in a variable in shell script

Question

I want to store each output of commands mpstat or mpstat -P ALL, like %usr,%nice,%sys,... in a variable.

Can you help me to do this,because I want to sum some of them.

Answer 1

Its a tough one but still I am managed to get something for you.

This line will print CPU data in a variable named CPU

eval "$(mpstat | awk '{print $3}' | xargs | awk '{print $2"="$3}')"

after doing this execute echo $CPU

you will get

[root@localhost BASH]# echo $CPU
all
[root@localhost BASH]#

and for %usr you can use eval "$(mpstat | awk '{print $4}' | xargs | awk '{print "USR="$3}')"

look at below example

[root@localhost BASH]# eval "$(mpstat | awk '{print $4}' | xargs | awk '{print "USR="$3}')"
[root@localhost BASH]# echo $USR
0.11
[root@localhost BASH]#

I hope you understand how to do this and you can develop complete code for what you want.

Summary:

[root@localhost BASH]# cat  forsome.sh
#!/bin/bash
eval "$(mpstat | awk '{print $3}' | xargs | awk '{print $2"="$3}')"
eval "$(mpstat | awk '{print $4}' | xargs | awk '{print "USR="$3}')"
echo "Number of CPU's :"$CPU
echo "%usr value      :"$USR

[root@localhost BASH]# ./forsome.sh
Number of CPU's :all
%usr value      :0.11
[root@localhost BASH]#