elp, I got this doing your suggestion:
roger@roger-G41M-ES2H ~ $ sudo chmod +x /usr/local/bin/xflux
roger@roger-G41M-ES2H ~ $
"cwsnyder: Look at http://www.control-escape.com/linux/lx-swinstall.html
and the section on installing from Tar Balls. You will probably need to find the README file or possibly go back where you got the tarball to find how to properly install. You may only have the compiled source and need to link the binary to the proper libraries to work."
This is way over my head.