I can match variable $1 and $2 as follow
awk -F, '{if($1 ~ /'$cust'/ && $2 ~ /'$os'/) print $1, $2, $3}'


but if I want to do as bellow it is not working
awk -F, '{if($1=$cust && $2=$os) print $1, $2, $3}'

I want to use if $1 equal to my customer name
&&
$2 equal linux

what I need to do

Use quotes like in your first statement (using ~operator) :
Another soltion is to use awk variable (the best solution if the awk script is long) :

It did notwork
I have tried this code by it returns nothing
awk -F, '{if($1=='$cust' && $2=='$os' ) print $1, $2, $3}'


The following commands works but I want to know how do I use awk

cat myfile|grep -e "^$cust,$os"
awk -F, '{if ($1==mycustomer && $2==linux) print $1,$2,$3}'
awk -F, '{if($1 ~ /'$cust'/ && $2 ~ /'$os'/) print $1, $2, $3}'

Sorry, missing double quotes :
Have you try the second form with awk variables ?

Yes Thank you