Hi,
this gist summarizes how to share UNIX files/folders with a Plan9 instance using u9fs.
First of all, grab the latest u9fs release from source or install it with the package manager of your preference, then build and install.
Please be sure to find the correct path to your u9fs binary because it may differ based on the installation, normally it is
/usr/local/bin/u9fs
or/usr/bin/u9fs
.
On older unix/linux systems you may use inetd, which is already covered by the u9fs man page.