[tor-relays] Installing obfs4 on Raspberry Pi bridge

[jchase]

Hello,
Thanks to you I have tor 0.2.5.11 running on a Raspberry Pi2 and obfs4
installed from git. I have good news and bad news.
The largest problem is that I get the warning "could not launch managed
proxy executable at '/path/obfs4proxy'('Permission denied')" In the past
this used to be a problem with apparmor, but apparmor isn't installed.
Any idea where I can start looking for a solution?
Here are a couple of details and small problems:
I didn't install obfs4 directly (due to problems), but installed it to
another laptop and copied it to the Pi2 using scp.
I have ORPort somewhere above 9000. When I set it to auto, I got a late
warning that the port chosen by tor was presenting problems, had I
arranged port forwarding, etc.? ExtORPort is "auto" and I get no
complaints (probably because obfs4 isn't working).
And I have ServerTransportListenAddr obfs3 0.0.0.0:90xx because a lower
port, like 80, with port forwarding, received a warning (and didn't work).
One thing at a time... Like I asked, where can I look for answers to the
obfs4proxy permission denied problem? If I get that fixed, I assume I
can play around with the rest until I can use lower ports.
Thanks,
J Chase