Re: Detecting amount of memory?

bc will round the value down,  you need to change your calculation to round
up  or using a different scale.

You would need to try it out, maybe something in the spirit of :

echo "scale 1; $memKB/1024.... |bc
if memGB -ge 5.5 ...

Ohad


On Tue, Dec 21, 2010 at 2:18 PM, Patrick Lists <[email protected]>wrote:

> Hi,
>
> I trying to create a kickstart script on CentOS 5.5 that installs an RPM
> depending on the amount of memory in the box. For example if the box has
> >= 6GB memory then install RPM2 else install RPM1. With some Googling I
> now have the following snippet:
>
> %pre
> memKB=$(free|grep Mem|awk '{print$2}')
> memGB=$(echo "($memKB/1024)/1024"|bc)
> BIGMEM=""
> if [ "$memGB" -ge 6 ]; then
>    BIGMEM="6GB"
> fi
>
> %post
> yum install foobar$BIGMEM-1.0-1.rpm
>
> The problem is that on a box with 6GB memory this snippet says it does
> not have 6GB mem:
>
> memKB = 6123716 KB
> memGB = 5 GB
>
> Anyone know what I am doing wrong?
>
> Thanks!
> Patrick
>
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