@mbhangui @bobbyprajan 
Kar diya 


 
used this website 
https://www.linuxtechi.com/install-nfs-server-on-debian-10-buster/
Simply tried the first two lines under setting up NFS Server
then the command sudo apt install nfs-common
Only then it worked 
Then from here 
https://www.eliaslundgaard.com/posts/mount-nas-to-pi/
linaro@linaro-alip:~$ sudo apt install nfs-common
Reading package lists... Done
Building dependency tree       
Reading state information... Done
nfs-common is already the newest version (1:1.3.4-2.5+deb10u1).
nfs-common set to manually installed.
The following packages were automatically installed and are no longer required:
  libaom0 libdrm-freedreno1 libdrm-tegra0 libmysofa0 libva-drm2 libva-x11-2
  libva2 libvdpau1 libvidstab1.1
Use 'sudo apt autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 200 not upgraded.
linaro@linaro-alip:~$ sudo mount -t nfs 192.168.0.115:/volume1/music /media/NAS
linaro@linaro-alip:~$ sudo df -k
Filesystem                    1K-blocks       Used Available Use% Mounted on
/dev/root                      14770540    3741740  10371744  27% /
devtmpfs                        1959156          8   1959148   1% /dev
tmpfs                           1968108     251916   1716192  13% /dev/shm
tmpfs                           1968108      17388   1950720   1% /run
tmpfs                              5120          4      5116   1% /run/lock
tmpfs                           1968108          0   1968108   0% /sys/fs/cgroup
/dev/mmcblk1p8                     4944        540      4148  12% /boot
tmpfs                            393620          8    393612   1% /run/user/1000
tmpfs                            393620          0    393620   0% /run/user/0
/dev/mmcblk0p1                123472876   84255036  39217840  69% /media/linaro/Tinker Music
192.168.0.115:/volume1/music 1917971584 1228731264 689121536  65% /media/NAS
linaro@linaro-alip:~$ sudo ls -l /media/NAS
total 4
drwxr-xr-x 125 1026 users 4096 Jan 28 11:47 'NAS MUSIC'
linaro@linaro-alip:~$