Permission denied under Ubuntu.

[Charles McAnany]

Hi, all.
I installed  dmd_2.054-0_amd64.deb on Ubuntu 11.04, and the compiler
seems to work fine, but I can't execute its output. Here's what I'm
doing: (ls to show directory contents)

$ dmd testFile.d
$ ./testFile
   bash: ./testFile: Permission denied

testFile.d is the Hello world program exactly as it appears on page 1
of TDPL.

Has anyone else had this issue? If it helps, I let the software center
thing do the installing, so if I need to manually change the
permission of something, I probably haven't done that.