ubuntu側
root@ubuntu:/home# /etc/init.d/rpcbind restart
bash: /etc/init.d/rpcbind: No such file or directory
解決方法：
root@ubuntu:/home# apt-get install nfs-kernel-server
root@ubuntu:/home# /etc/init.d/rpcbind restart
[ ok ] Restarting rpcbind (via systemctl): rpcbind.service.
root@ubuntu:/home# /etc/init.d/nfs-kernel-server restart
[ ok ] Restarting nfs-kernel-server (via systemctl): nfs-kernel-server.service.
CRT側
root@OpenWrt:~# busybox mount -t nfs -o nolock 192.168.2.13:/home/work /mnt/
mount: mounting 192.168.2.13:/home/work on /mnt/ failed: No such device
解決方法：核心配置打開NFS，如圖所示：
root@OpenWrt:~# busybox mount -t nfs -o nolock 192.168.2.13:/home/work /mnt/
mount: mounting 192.168.2.13:/home/work on /mnt/ failed: Protocol not supported
解決方法：
核心配置打開nfs-v3，如圖所示：
root@OpenWrt:~# busybox mount -t nfs -o nolock 192.168.2.13:/home/work /mnt/
mount: mounting 192.168.2.13:/home/work on /mnt/ failed: Permission denied
解決方法：
打開/etc/exports檔案，在最後加一行：
/home/work *(rw,sync,no_root_squash)
重新開機nfs服務：
/etc/init.d/nfs-kernel-server restart
執行挂載指令即可正常挂載，最後使用mount檢視挂載情況