Linux : NFS not mounting on boot even with fstab entry
If you have come across a problem where you had an entry for an NFS server on any systemd system, and it is not mounting those at boot, but it mounts when issuing a sudo mount -a I have a solution for you
The Fix
Update your fstab entry by editing /etc/fstab and adding these options. 
server IP:/share_path   /mountpoint/on/client  nfs  _netdev,noauto,x-systemd.automount,x-systemd.mount-timeout=10,timeo=14,x-systemd.idle-timeout=1min 0 0A practical example
192.168.40.100:/volume1/Media     /nas/media   nfs  _netdev,noauto,x-systemd.automount,x-systemd.mount-timeout=10,timeo=14,x-systemd.idle-timeout=1min 0 0This should be it