Matt Thomas writes:
> I'm running 1.2G (sup'ed last night) kernel and user on my laptop.
> My filesystems are 4.4bsd.  I'd like to be able to do
> 
> 	mount -t union -o -b /usr/src ~/cvs/src
> 
> but I get union: Operation not supported.  Referencing to the man
> pages I think I'm doing everything right.  
> 
> Any ideas?

I hate to ask the obvious, but...

1) is unionfs in your kernel?
2) does your shell do the right thing with ~/

Perry