Create NFS export for Proxmox

apt-get install nfs-kernel-server nfs-common

mkdir /directory/to/be/shared
chown root:root /directory/to/be/shared
chmod 755 /directory/to/be/shared

nano /etc/exports

/directory/to/be/shared 111.111.111.111(rw,sync,no_root_squash)

Change /directory/to/be/shared with your path and 111.111.111.111 with the client’s IP address