NFSマウントできなかった

$ sudo mount -a
mount: wrong fs type, bad option, bad superblock on nas1:/datavol,
       missing codepage or helper program, or other error
       (for several filesystems (e.g. nfs, cifs) you might
       need a /sbin/mount.<type> helper program)
       In some cases useful info is found in syslog - try
       dmesg | tail  or so

nfs-commonインストールするの忘れてた

$ sudo apt-get install nfs-common