On 04/24/2015 09:59 AM, Steve Lindemann wrote: > > A script with no shebang will run in the environment of the account > running the script. Bad test on my part, apparently. $ python >>> import os >>> os.execv('/home/gmessmer/test', ('test',)) Traceback (most recent call last): File "<stdin>", line 1, in <module> OSError: [Errno 8] Exec format error So a script with no shebang will fail when the shell calls exec(). If that's so, then starting the executable script with an interpreter is probably shell-defined. In other words, each shell might do something different to run a script that has no shebang. Most probably do default to trying itself as the interpreter first. Interesting.