I download this file avast.u3p for avast linux home edition but cannot install them… please help
avast.u3p is U3 Edition of avast!, not Linux. Maybe you downloaded a wrong file?
Actually Igor, I think that the link on the site is broken. The link for the Linux version leeds to this file avast.u3p
Ops, correction the link isn’t available anymore, but I am sure it was there before (at least when I checked it before hour ago). Now it states:
Download of this product will be available on March 3, 2006
Ah, OK, the site is probably being updated.
In any case, avast.u3p is the installation package of avast! U3 Edition - i.e. nothing to install under Linux.
Welcome to the forums, franjr. 
As noted above, a Linux version of Avast should be available very soon.
Please come back often, learn more, and maybe help others.
How’s that for fast service? It’s now available!
yep