Shell Programming and Scripting

Hi All,

i have an output of command

Code:

vmstat

as below :
out of this i am trying to match only for "lcpu=4" for eg : lcpu=<digits> .
can someone provide me some clue of how to do it either suing awk,sed or perl.

the numerical value can be more than single digits for eg lcpu =40

Hello,

Followoing may help.

Code:

awk '/lcpu/ {print $(NF-2)}' vmstat_output

Output will be as follows. Where vmstat_output is input file.

Code:

lcpu=4

Thanks,
R. Singh

thanks a lot ravinder..for the below command:
awk '/lcpu/ {print $(NF-2)}' vmstat_output

this command is based on the number of fileds and it may be possible that we can have n number of fileds in the output of vmstat.

so can you please help me in making the search pattern more specific,rather than just searching for 'lcpu' , can we try to search for lcpu=<numerica value> and the print should be irrespective of the number of field , that is the output of search should only be lcpu=4 and not the other fileds like 'System configuration:mem=5376MB ent=1.00'

please suggest.

Hello Omkar,

kindly let me know if following helps you.

Code:

awk -vs1="lcpu= " -F"=" 'NR==1 {a=$2} gsub(/[a-z]/,X,a) {print s1 a}' vmstat_output

Thanks,
R. Singh

This script return nothing .....

Omkar,

If you are not saving the output for vmstat into a file then following will help.

Code:

vmstat | awk -vs1="lcpu= " -F"=" 'NR==2 {a=$2} gsub(/[a-z]/,X,a) {print s1 a}'

Thanks,
R. Singh

great its really helpful and i am trying to learn awk from you..

could you please explain me the workjing of this command in short..i will try and test it with some more example..

also i am trying to get only the output which is infront of "Entitled Capacity" and exclude other lines.

i am using below grep option to get this result but i want to learn how to make it possible using awk:

command i am using :

Code:

$ lparstat -i | grep -w "Entitled Capacity" | grep -v "Entitled Capacity of Pool"
Entitled Capacity                          : 1.00

the original command is :

Code:

lparstat -i | grep -w "Entitled Capacity"
Entitled Capacity                          : 1.00
Entitled Capacity of Pool                  : 1900

from here i just want to read 'Entitled Capacity' and its value and exlcue other lines ( like :Entitled Capacity of Pool )

thanks a lot