Hi! Try mount under root.
Check /etc/sudoers for correct permissions.

I'm using it, and 9P works fine.

2006/11/16, Adrian Tritschler <ajft@ajft.org>:
Having successfully (I think) turned a plan9 terminal into an auth/cpu
system at home, I'm trying to export its fossil file system and then
mount this on a linux (Ubuntu) system.  Reading back through various
mails here suggest it should be simple.

Something isn't quite right (yet). I'm trying to mount the fossil
filesystem on the linux system, run:

fafnir:/tmp$ sudo mount -t 9p -o user=ajft 10.0.0.123 /mnt
mount: permission denied

/var/log/syslog contains:

Nov 15 22:17:27 localhost kernel: [18670662.760000] v9fs_errstr2errno:
errstr :cannot attach as none before authentication\ufffd\377\ufffd: not
found

any ideas or suggestions?

--
Adrian Tritschler <ajft@ajft.org>