[vox-tech] Bash completion mystery

[Bruce Wolk]

I am trying to find the location of an executable file named 
mkvirtualenv.  If I run "locate mkvirtualenv" it does not find it.  If I 
run "sudo find . -name mkvirtualenv" from the root directory it does not 
find it.  "which mkvirtualenv" yields nothing.  But if I type mkvi<tab>, 
bash completion completes it and it will execute from any directory. 
Can someone explain to me what is going on?  I am using Ubuntu 10.04. 
Thanks.

Bruce Wolk