trying to update avast definitions

[ray burke]

On 4/29/10, Michael Hirsch <mdhirsch at gmail.com> wrote:
> On Sun, Apr 25, 2010 at 3:28 PM, ray burke <rayburke30 at gmail.com> wrote:
>  > ---------- Forwarded message ----------
>  > From: ray burke <rayburke30 at gmail.com>
>  > Date: Apr 25, 2010 4:07 PM
>  > Subject: trying to update avast definitions
>  > To: Kubuntu users forum <kubuntu-users-bounces at lists.ubuntu.com>,
>  > kubuntu-users-owner <kubuntu-users-owner at lists.ubuntu.com>
>  >
>  >
>  > does any one know about this, as to update virus def in Kubuntu see
>  >  below received from Avast
>  >
>  >  I received this from avast but don't comprehend?
>  >
>  >
>  >  [ASW #MKK-509638]: Comment from DEMO license request for avast! for
>  >  Linux, From: ray burke‏
>  >  From:   avast sales (sales at avast.com)
>  >       Medium riskYou may not know this sender.Mark as safe|Mark as junk
>  >  Sent:   Monday, 19 April 2010 6:47:10 PM
>  >  To:     rayburke30 at hotmail.com
>  >
>  >  Hello,
>  >  some people might report that avast4linux/Workstation doesn't work with
>  >  latest VPS (problem started with 100328-1 for them). The reason is that
>  >  "macro"-block in 400.vps is now depacked to something bigger than
>  >  33554432 bytes - this is an artificial SHM block limitation in some
>  >  Linux kernels (kernel.shmmax).
>  >
>  >  Solution? Set the limit to higher values (as root):
>  >
>  >  sysctl -w kernel.shmmax=128000000
>  >  OR
>  >  echo 128000000 >/proc/sys/kernel/shmmax
>
>
> I don't know anything about Avast, but I've had to do this with other
>  programs.  I think postgresql in some settings requires this
>  adjustment, too.  I don't know of any security issues with raising
>  that number.
>
>  Michael
>
>
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Michael Hirsch,

cause I am a novice I am not sure how it is done, as need step by step guide,
can you help?

ray