[CentOS] virtualbox, lvextend, etc.

[Barry Brimer]

> but when I do:
>
> df -h
>
> I still see only the original 8gig disk (8gig total - 4gig data/4gig swap)).

I see this extending the logical volume, but not the filesystem on the 
logical volume.  You can use resize2fs <device> to do that.