nodevpn v2
if error no such file or directory, open '/dev/net/tun'
mkdir -p /dev/net
mknod /dev/net/tun c 10 200
chmod 600 /dev/net/tun
if error no such file or directory, open '/dev/net/tun'
mkdir -p /dev/net
mknod /dev/net/tun c 10 200
chmod 600 /dev/net/tun