Well, after spending hours trying to figure out why the documented
install doesnt work, I found by trial and error a workaround. running
the jar directly always fails. However, if you first unpack then run, it
at least starts. java -jar aem-author-4502.jar -unpackcd
crx-quickstart/bin./start Interestingly, the unpacked version is
different from the version you get when you just run the jar directly as
per instructions. If you unpack, it actually sets the execute bit on the
start script.